英语词汇“signal”的意思、释义、用法解释及翻译-春雷网

signal¹

nounPlural signals ˈsɪɡn(ə)lˈsɪɡnəl

1A gesture, action, or sound that is used to convey information or instructions, typically by prearrangement between the parties concerned.
信号；暗号
the firing of the gun was the signal for a chain of beacons to be lit
开枪是接连点燃烽火的信号。
with infinitive the policeman raised his hand as a signal to stop
警察举起手，示意停下。
Example sentencesExamples
- Anna raised her hand in a signal for Justine to stop.
- Jumping onto a table, Crush raised her hands in the air as a signal for her friends to stop they were doing; she watched as they obliged, halting their food war.
- This instruction was a sound signal by a pager, randomly activated by the experimenter via the telephone.
- Noor, in typical logical mode, made a soft hissing noise with her teeth, the signal for any motion to halt gradually but fast.
- So we waited for either John our floor warden to let us know what we should do, or for an evacuation signal to sound.
- Valeo says it can customize the system to notify the driver in other ways, perhaps by sound or a signal on the instrument panel.
- A signal was sounded in Post Offices across the country and customers were asked to join staff in remembering the dead and injured.
- This gesture was a signal to his kids that he loved them.
- Fire alarm signals must be distinctive in sound from other signals.
- The Prince halted and held up his arm in a signal for the others to stop.
- She made a signal for him to stop as Mary kept on talking.
- Rather than rely on conversation, develop hand signals and subtle sounds to communicate with hunting partners while walking or rattling in the woods.
- She didn't fall too badly and merely got rather wetter than originally planned, but this was the signal for our party to exit the fountain and attempt to dry off.
- His first shot would be the signal for the rest of his team to open fire.
- Tired, grumpy, she waved her hand as a signal for me to come in.
- Casey's head snapped around and she grabbed Alex, making the signal for ‘stop and listen’ with her free hand.
- When the emergency is over and the all-clear signal is sounded, remember that outside air is still contaminated.
- With hand signals, she gestured for the rest of the team to follow her into the next hallway, which would lead to the first floor staircase.
- Most people probably regard smiling, frowning and other such external signals of emotion as gestures that give expression to internal feelings, which come first.
- Several days later, spotting the crow's nest of the ship over the headland of Cape Evans, they lit a fire as a signal for the ship to steam back and pick them up.
Synonyms
gesture, sign, wave, gesticulation, cue, prompt, indicator, indication, communication, message
alert, warning, tip-off
action, movement, motion
body language, kinesics
1. 1.1 An indication of a situation.
  标志；表示
  the markets are waiting for a clear signal about the direction of policy
  市场正等待着一个明确的政策动向。
  Example sentencesExamples
  The earlier signals which hinted at the emergence of fiscal prudence, quickly faded out.
  Pools of all sizes tested gave positive signals indicating that all the pool sizes are amenable for the PCR assay.
  About 20 minutes later mission control erupted in cheers, hugs and tears when a signal from the craft indicated it was still functioning.
  But if his signals indicate romance is a no-go, change the channel on your emotions by hanging out more often with other friends.
  Trouble signals are indicated when a detector becomes too ‘dirty’ to properly function.
  We have detected signals indicative of hydrothermal activity in several areas, including both basins.
  Misreading signals can be disastrous in these situations.
  When the stressful situation ends, hormonal signals switch off the stress response and the body returns to normal.
  That is a strong signal of the positive move of the SARS situation.
  Yet that kind of balanced lending is something which bankers who operate without market signals have yet to show much finesse for without clear direction from above.
  A signal is then produced indicating that the structure is complete and the scaffolding protein detaches to be used again in making other virus tails.
  This indicates the need for a clear signal to be given early in the New Year that rates are coming down.
  Controllers had seen a signal indicating a possible problem with the capsule's heat shield, so I was advised to keep the retrorocket pack attached to hold the heat shield in place.
  The data on rising earnings comes amid conflicting signals about the job situation for technology professionals in the United States.
  The figures provided positive signals on the state of the economy, with tax receipts from wages, consumer spending and stamp duty all ahead.
  Education Leeds assistant chief executive Roland Absalom said it was a clear signal that the situation was improving.
  One possible benefit of mate choice occurs if females can use male courtship signals as an honest indicator of male nutritional contributions at mating, nuptial gifts.
  Stress signals indicated that he needed to create a more balanced life, to keep divorce and a heart attack at bay.
  That may indicate that incoming pain signals are being delivered by the spinal cord in a similar way for different people, but once they arrive in the brain they are handled differently.
  It's too early to predict what might happen in the case of nanotechnology, but early signals indicate Congress is eager to tie strings to funding.
  Synonyms
  indication, sign, symptom, hint, pointer, suggestion, intimation, clue, manifestation, demonstration
  token, testimony, evidence, attestation, proof
2. 1.2 An event or statement that provides the impulse for an occurrence.
  起因；导火线
  the champion's announcement that he was retiring was the signal for scores of journalists to gather at his last match
  这位冠军宣布他将退役，这就是那么多记者出席他最后一场比赛的原因。
  Example sentencesExamples
  A certain amount of inflation is needed anyway to provide market signals to increase production and investment.
  For patients, monitoring may provide a signal for action or simply provide motivation to adhere to treatment.
  In the fruit fly Drosophila melanogaster, the X: A ratio serves as the primary signal for somatic sex determination.
  When Sheffield saw a player dismissed for two yellow card offences it was the signal for Vale to press forward again.
  Gerard Rice made it 2-1 for Newcastle midway through the second half, a signal for the Seasiders to turn up the pressure.
  The oxidative stress caused by ozone may serve as the initial signal for programmed cell death and a hypersensitive response.
  A drop in the intracellular concentration of glutamine provides a signal for the activation of transcription of nitrogen-regulated genes.
  Their success has been a signal for other Aboriginal communities to follow suit.
  However, we have noticed that there is a temporal increase in these mutations which should serve us a warning signal for prescribing the SP treatment.
  It has been hypothesized that the products of two different sex alleles may form an active heterodimer that serves as an unambiguous signal for sex determination.
  Synonyms
  cue, prompt, occasion, green light, incentive, impetus, impulse, stimulus
  informal go-ahead
3. 1.3Bridge A prearranged convention of bidding or play intended to convey information to one's partner.
  〔桥牌〕信号
  Example sentencesExamples
  Therefore it is normal for the first two players to use the low bids as signals.
  When leading to a trick, certain remarks or signals are allowed.
  When playing against a trump contract this can be achieved by a simple system of discard signals.
  Make an agreement with your partner to look for the signal after each time that the cards are swept away.
  Naturally they will try to do this while the opponents are not looking, but as the signals do not need to be true, you can also try to confuse the opponents by passing misleading signals, at the risk of confusing your partner as well.
2An electrical impulse or radio wave transmitted or received.
（电脉冲或无线电波传递或接收的）信号
equipment for receiving TV signals
接收电视信号的设备。
Example sentencesExamples
- It served as a transmission station to send and receive radio signals from Europe, South America and The United States.
- Cochlear implants transmit electrical signals from the inner ear to the brain, which interprets them as sound.
- Each antenna, starting at a different moment, sends out its own signals on regular radio waves.
- Marconi was the first to use electromagnetic waves to transmit signals 101 years ago.
- These tags transmit and receive radio signals to and from nearby scanners.
- These chips feature an antenna to transmit and receive radio signals.
- These units may be placed in either homes or businesses to receive and transmit a wireless broadband signal.
- These electrical signals send electrical impulses across the skin to an implanted receiver/stimulator in the shoulder to the electrode leads in the arm and hand.
- The dishes send and receive signals off an orbiting network relay, which transmits messages to and from a central data center.
- Underlying every thought and bodily motion are nerve and muscle cells sending or receiving electrical signals.
- A fit or seizure happens when there is a brief change or break in the way cells normally send and receive these electrical signals.
- In the past, the electrodes transmitted the electrical signal by wires to a receiver and amplifier, and the results were recorded on a continuous roll of paper.
- The pump activated once it received the electrical signal.
- The implants receive electrical signals from a camera positioned outside the body.
- Each cell has a base station that transmits and receives signals over just a small fraction of the frequencies to which the network operator has access.
- The development of the electromagnet about 1837 provided the American Samuel F. B. Morse with a way to transmit and receive electric signals.
- Speech and other sounds are sent to the speech processor where they are converted into electrical signals and sent to the transmitting coil.
- We are using radio wave signals, so we need to be high up to have a clear view - radio waves lose about 60 per cent of their power when they hit a wall.
- Because the signal is transmitted over radio waves, others can listen in to any transmissions, so the authentication mechanisms are also visible.
- The problem is that forks in the electrical grid reflect broadband signals and thereby degrade transmission.
3An apparatus on a railway, typically a coloured light or a semaphore, giving indications to train drivers of whether or not the line is clear.
（铁路上的）信号灯
the driver of the mail train overran a signal at danger and ran into the rear of an express
Example sentencesExamples
- Mitchell said police had yet to determine whether the railway signals and gates were working at the time of the crash.
- The strike will affect repairs and fault finding in areas such as signals, train network and level crossings.
- At one point, we had to stop at an interlocking and the dispatcher couldn't clear the signal because of the train ahead.
- At the Hayward's Heath accident in 1973 the driver misread the signals and drove his loopline train on to the main line and it was struck from behind by an express.
- By the time they finally achieved rail lock on the bridge and the signals had cleared, there were five southbound trains stuck behind the bridge coming from New York.

verbsignalling, signalled, signals, signaled, signaling ˈsɪɡn(ə)lˈsɪɡnəl

[no object]

1Convey information or instructions by means of a gesture, action, or sound.
用信号传递信息（或指示）；发信号
hold your fire until I signal
在我发信号之前，一直举着火把。
Example sentencesExamples
- After what seemed like an eternity to Jalen, the hunting horn sounded, signaling in the hunt's end.
- My first thought was that mother would wave her hand signalling me down to her.
- It is an error-free link to the application; it will either give good data or keep trying to get good data until it signals that the link is down.
- You want to signal him that you're going to leave - but the room is too loud.
- A buzzer sounded, signaling that the battle was over.
- Cody makes a stupid buzzing sound signaling I had gotten the answer wrong.
- Somewhere in the distance a bell sounded, signaling that the break was half over.
- At 8: 00 a.m. a rocket sounds off, signaling that the bulls are on the street, and a hush fails over the crowd.
- Motioning for her to stay around the corner until he signalled, Paris walked towards Blair's cell.
- The car gave a small beeping sound to signal that it was open.
- She stopped at the end of the sidewalk and waited for the sound that signaled she could cross the street.
- A tone sounded, signaling that the next shift should come to the bridge immediately.
- The captain nodded a little bit as his body swayed gently as a locking sound went through the entire ship signaling that all was secure and the ship was now pressurizing itself.
- Today, when I was leaving work, a woman who works in the division that my department supports signalled me over.
- He and the other men would fly until after dusk, hoping survivors might be trying to signal with a fire.
- A glance towards his father signaled he was ready.
- The bell sounds, signaling that this particular day of school has officially come to a close.
- Claire no sooner had entered the EMS station that the bell sounded, signaling that they were needed somewhere to help somebody.
- Settling into his chair, the king waved vaguely at the man to signal him that he could read his missive.
- Madoka's father must have handed the parking attendant a tip ahead of time with instructions to signal when Madoka and her mother arrived.
1. 1.1with object and infinitive Instruct (someone) to do something by means of gestures or signs.
  （用信号）示意
  she signalled Charlotte to be silent
  她示意夏洛特不要说话。
  Example sentencesExamples
  When he saw Sarah at the window he waved and signaled her to come outside.
  I closed my eyes and nodded, signaling her to go on.
  She took his arm, and winked at Rina, signalling her to follow.
  And then, he saw Nathan waving a hand, signaling him to come closer.
  Michele saw Mr. Coltrane excuse himself from the crowd of executives, and wave a hand to her to signal her to join him.
  I wave at him, indirectly signaling him to leave.
  Steven stepped closer, signalling me to do or say something, and out the corner of my eye, I saw Paul flinch as though he was ready to throw another punch.
  He leaned back and waved his hand signalling Andrea to go over to him.
  The siren is wailing, signaling you to pull over.
  She stopped at the street corner and waited for the walk sign to turn on and signal her to cross.
  She gave the thumbs-up sign to her mechanic, signaling him to get out of the way.
  I leaned over and tapped Alyssa on the shoulder, and signaled her to follow me by motioning my head in that direction.
  He heard the trunk slam shut, signaling him to depart.
  Sasaki held her hand out, signaling Chloe to be quiet.
  I made motions with my hand signaling Elizabeth to keep it down.
  Expressionless except for his puffed cheeks, he blew his whistle twice, signaling us to fall in line behind the school's back door.
  He waved his hand, signaling someone to go up to the front.
  It's as if we are waiting for a starting gun to signal us to go.
  I saw Milgridge waving me toward him, signaling me to run.
  Waving his hand to me, he signaled me to come join him.
  Synonyms
  gesture, sign, give a sign to, indicate, direct, motion, gesticulate
  wave, beckon, nod
2. 1.2 (of a cyclist, motorist, or vehicle) indicate an intention to turn in a specified direction using an extended arm or flashing indicator.
  （骑自行车者，驾驶司机，交通工具）打信号（以示转向）
  with complement Stone signalled right
  斯通打出右转的信号。
  with infinitive the truck signalled to turn left
  卡车打出左转的信号。
  Example sentencesExamples
  That may lead to the issue of whether he was simply following this tractor trailer too closely or whether, in fact, if the tractor trailer wasn't signaling.
  While making a right turn at any turning off a main road, you are advised to signal, wait for other vehicles and check your rear view mirror.
  When turning into the second of two junctions which are close to each other, the driver should not signal until he has passed the first junction.
  Just as I was beginning to worry that my tow truck would never appear, a truck signalled off the highway and came to a stop right behind.
  His report also states that the defendant vehicle signaled and turned left onto Orenda.
  Kate whipped her Chevy Cavalier into the driveway without signaling as angry motorists honked and yelled obscenities at her.
  Don't expect other vehicles to signal their intentions - indicators don't necessarily mean they want to turn.
  ‘Many do not have any road sense, do not know what and how to signal with hand and are totally indifferent to vehicles in their front and back’.
  It may be a split second of indecision at a roundabout, a moment's inattention while pulling out of a parking space, a failure to spot another driver signalling.
3. 1.3with object Indicate the existence or occurrence of (something) by actions or sounds.
  （用举动或声音）表示，表明
  the Community could signal displeasure by refusing to cooperate
  该社区可以通过拒绝合作来表明自己的不悦。
  with clause she gave a glance which signalled that her father was being secretive
  她瞥了一眼，暗示她父亲不坦率。
  Example sentencesExamples
  In the third frame, the two clubs combined for four goals before the horn sounded to signal the end of the game.
  The sounds of approaching footsteps signaled the return of the other tourists.
  The sound of crunching leaves signals the closeness of the man and soon enough, the driver's door opens.
  A blip sounded off signaling the entry of an intruder.
  A small bell tinkled above my head, the sound signaling my arrival.
  After this fun, a foghorn sounded to signal the beginning of a ‘self-guided’ walking tour.
  In the background the drums sounded signaling the end of the dance.
  A horn sounded, signalling the arrival of Peter's opponent.
  For the best part of a century, that clanging sound signalled the abrupt end of an English night out.
  Dallas seemed to indicate a free-kick but his assistant, Derek Lowe, signalled that the offence had been inside the area.
  Caelyn was grateful when the last bell sounded, signaling the end of school for another day and another week.
  In measures 68 and 69, an A-major chord, the dominant of the key, is sounded, signaling the end of the piece.
  Finally, the gun sounded again, signaling the last lap of the race.
  Several metrics likely signaled declining performance and the need to reduce headcount.
  In fact I was almost sad when the bell sounded signalling the end of lunch.
  She recognized the sound - it signalled a weapons lock-on.
  Counselors need to understand that the sound of sirens may signal danger to them.
  He lifted his head at the sound of voices signalling attention.
  Finally the gong sounded, signaling the end of Mihradi's shift.
  ‘Students, please rise for the Pledge of Allegiance,’ the loud speaker sounded, signaling the beginning of the announcements.
  Synonyms
  indicate, show, express, communicate
  announce, proclaim, declare, pronounce

Derivatives

signaller

noun ˈsɪɡnələ

Stockport No 2 signal box, built in the 1870s, has 60 levers and is operated manually by two signallers using a system of bells and flashing lights.
Example sentencesExamples
- The event on Saturday was aimed at highlighting the 15,000 jobs in more than 140 trades which the Army has to offer, with engineers, signallers, guardsmen and mechanics among those on hand to talk to young people and their families.
- Thousands of drivers, signallers and maintenance workers walked out from 6.30 pm yesterday causing the worst travel disruption in the capital for two years.
- About 300 engineers and 700 signallers will be recruited from school leavers, graduates, those who took early retirement, people returning from a career break and professional engineers.
- The equipment is needed to allow rail staff in the Sheffield area, including signallers, to speak to one another.

Origin

Late Middle English: from Old French, from medieval Latin signale, neuter of late Latin signalis, from Latin signum 'mark, token' (see sign). The verb dates from the early 19th century.

Rhymes

spignel

signal²

adjective ˈsɪɡn(ə)lˈsɪɡnəl

attributive Striking in extent, seriousness, or importance; outstanding.
明显的；显著的；显要的；出色的
he attacked the government for their signal failure of leadership
他攻击政府明显领导无能。
Example sentencesExamples
- Irony is of signal importance in English humour, in everything from radio comedy to literature.
- To some the signal importance of that event was eclipsed by another aspect of the morning's ceremonies.
- In recent years, the signal failures of those systems to reverse years of misguided teachings appear to be dooming the region to years of further conflict.
- Irfan Habib, an eminent Marxist historian, is known for his signal contribution to the study of medieval India and the making of the modern Indian state.
- Although of signal importance in itself, even the characteristic dominance must be seen as a by-product of serum testosterone.
- One of the signal developments of the past few years is the near-incestuous absorption of media firms by one another.
- The signal orange color of the shirt was chosen for the same reason it is used where caution is required - it's the most visible color in person, on camera, and on video.
- The ability to create brilliant work over a long period of time is the signal characteristic of Bob Dylan's genius.
- It was not until near the end of Freud's life that he began to appreciate the signal importance of the infant's relationship with the mother.
- You can understand why I would have assumed it was Jeffrey Hudson, but all this is a signal lesson as to why you shouldn't jump to such obvious conclusions and look for alternative explanations.
Synonyms
notable, noteworthy, remarkable, striking, glaring, outstanding, significant, momentous, memorable, unforgettable, pronounced, marked, obvious
impressive, distinguished, uncommon, unusual, particular, special, extraordinary, exceptional, conspicuous, rare

Derivatives

signally

adverb ˈsɪɡnəliˈsɪɡnəli

The Merovingians had signally failed to rule other peoples, or even themselves, and it was this system that Charles had inherited.
Example sentencesExamples
- It's made me think hard about the moments where my own leadership has been signally lacking.
- By 1932 the gold standard had strayed so far from purity, so far from what it could and should have been, that its weakness contributed signally to its final breakdown in 1933.
- What is it that the fourth increase in interest rates is likely to achieve where the previous three have so signally failed?
- But he signally failed to sort out rates of migration to these islands, which have peaked after being consistently low for a quarter-century.

Origin

Early 17th century: from French signalé, from the Italian past participle segnalato 'distinguished, made illustrious', from segnale 'a signal'.

signal¹

nounˈsɪɡnəlˈsiɡnəl

1A gesture, action, or sound that is used to convey information or instructions, typically by prearrangement between the parties concerned.
信号；暗号
the firing of the gun was the signal for a chain of beacons to be lit
开枪是接连点燃烽火的信号。
with infinitive the policeman raised his hand as a signal to stop
警察举起手，示意停下。
Example sentencesExamples
- Most people probably regard smiling, frowning and other such external signals of emotion as gestures that give expression to internal feelings, which come first.
- Anna raised her hand in a signal for Justine to stop.
- With hand signals, she gestured for the rest of the team to follow her into the next hallway, which would lead to the first floor staircase.
- Rather than rely on conversation, develop hand signals and subtle sounds to communicate with hunting partners while walking or rattling in the woods.
- Valeo says it can customize the system to notify the driver in other ways, perhaps by sound or a signal on the instrument panel.
- She made a signal for him to stop as Mary kept on talking.
- Several days later, spotting the crow's nest of the ship over the headland of Cape Evans, they lit a fire as a signal for the ship to steam back and pick them up.
- Fire alarm signals must be distinctive in sound from other signals.
- The Prince halted and held up his arm in a signal for the others to stop.
- A signal was sounded in Post Offices across the country and customers were asked to join staff in remembering the dead and injured.
- His first shot would be the signal for the rest of his team to open fire.
- Jumping onto a table, Crush raised her hands in the air as a signal for her friends to stop they were doing; she watched as they obliged, halting their food war.
- So we waited for either John our floor warden to let us know what we should do, or for an evacuation signal to sound.
- Noor, in typical logical mode, made a soft hissing noise with her teeth, the signal for any motion to halt gradually but fast.
- This instruction was a sound signal by a pager, randomly activated by the experimenter via the telephone.
- Casey's head snapped around and she grabbed Alex, making the signal for ‘stop and listen’ with her free hand.
- This gesture was a signal to his kids that he loved them.
- When the emergency is over and the all-clear signal is sounded, remember that outside air is still contaminated.
- Tired, grumpy, she waved her hand as a signal for me to come in.
- She didn't fall too badly and merely got rather wetter than originally planned, but this was the signal for our party to exit the fountain and attempt to dry off.
Synonyms
gesture, sign, wave, gesticulation, cue, prompt, indicator, indication, communication, message
1. 1.1 An indication of a state of affairs.
  标志；表示
  the markets are waiting for a clear signal about the direction of policy
  市场正等待着一个明确的政策动向。
  Example sentencesExamples
  Yet that kind of balanced lending is something which bankers who operate without market signals have yet to show much finesse for without clear direction from above.
  The earlier signals which hinted at the emergence of fiscal prudence, quickly faded out.
  One possible benefit of mate choice occurs if females can use male courtship signals as an honest indicator of male nutritional contributions at mating, nuptial gifts.
  This indicates the need for a clear signal to be given early in the New Year that rates are coming down.
  About 20 minutes later mission control erupted in cheers, hugs and tears when a signal from the craft indicated it was still functioning.
  Controllers had seen a signal indicating a possible problem with the capsule's heat shield, so I was advised to keep the retrorocket pack attached to hold the heat shield in place.
  Trouble signals are indicated when a detector becomes too ‘dirty’ to properly function.
  It's too early to predict what might happen in the case of nanotechnology, but early signals indicate Congress is eager to tie strings to funding.
  Misreading signals can be disastrous in these situations.
  That may indicate that incoming pain signals are being delivered by the spinal cord in a similar way for different people, but once they arrive in the brain they are handled differently.
  A signal is then produced indicating that the structure is complete and the scaffolding protein detaches to be used again in making other virus tails.
  But if his signals indicate romance is a no-go, change the channel on your emotions by hanging out more often with other friends.
  The data on rising earnings comes amid conflicting signals about the job situation for technology professionals in the United States.
  That is a strong signal of the positive move of the SARS situation.
  Stress signals indicated that he needed to create a more balanced life, to keep divorce and a heart attack at bay.
  Pools of all sizes tested gave positive signals indicating that all the pool sizes are amenable for the PCR assay.
  Education Leeds assistant chief executive Roland Absalom said it was a clear signal that the situation was improving.
  We have detected signals indicative of hydrothermal activity in several areas, including both basins.
  The figures provided positive signals on the state of the economy, with tax receipts from wages, consumer spending and stamp duty all ahead.
  When the stressful situation ends, hormonal signals switch off the stress response and the body returns to normal.
  Synonyms
  indication, sign, symptom, hint, pointer, suggestion, intimation, clue, manifestation, demonstration
2. 1.2 An event or statement that provides the impulse or occasion for something specified to happen.
  起因；导火线
  the champion's announcement that he was retiring was the signal for scores of journalists to gather at his last match
  这位冠军宣布他将退役，这就是那么多记者出席他最后一场比赛的原因。
  Example sentencesExamples
  When Sheffield saw a player dismissed for two yellow card offences it was the signal for Vale to press forward again.
  Gerard Rice made it 2-1 for Newcastle midway through the second half, a signal for the Seasiders to turn up the pressure.
  It has been hypothesized that the products of two different sex alleles may form an active heterodimer that serves as an unambiguous signal for sex determination.
  Their success has been a signal for other Aboriginal communities to follow suit.
  In the fruit fly Drosophila melanogaster, the X: A ratio serves as the primary signal for somatic sex determination.
  However, we have noticed that there is a temporal increase in these mutations which should serve us a warning signal for prescribing the SP treatment.
  For patients, monitoring may provide a signal for action or simply provide motivation to adhere to treatment.
  A certain amount of inflation is needed anyway to provide market signals to increase production and investment.
  The oxidative stress caused by ozone may serve as the initial signal for programmed cell death and a hypersensitive response.
  A drop in the intracellular concentration of glutamine provides a signal for the activation of transcription of nitrogen-regulated genes.
  Synonyms
  cue, prompt, occasion, green light, incentive, impetus, impulse, stimulus
3. 1.3Bridge A prearranged convention of bidding or play intended to convey information to one's partner.
  〔桥牌〕信号
  Example sentencesExamples
  When leading to a trick, certain remarks or signals are allowed.
  When playing against a trump contract this can be achieved by a simple system of discard signals.
  Make an agreement with your partner to look for the signal after each time that the cards are swept away.
  Naturally they will try to do this while the opponents are not looking, but as the signals do not need to be true, you can also try to confuse the opponents by passing misleading signals, at the risk of confusing your partner as well.
  Therefore it is normal for the first two players to use the low bids as signals.
2An electrical impulse or radio wave transmitted or received.
（电脉冲或无线电波传递或接收的）信号
equipment for receiving TV signals
接收电视信号的设备。
Example sentencesExamples
- Because the signal is transmitted over radio waves, others can listen in to any transmissions, so the authentication mechanisms are also visible.
- These tags transmit and receive radio signals to and from nearby scanners.
- Speech and other sounds are sent to the speech processor where they are converted into electrical signals and sent to the transmitting coil.
- The problem is that forks in the electrical grid reflect broadband signals and thereby degrade transmission.
- Each antenna, starting at a different moment, sends out its own signals on regular radio waves.
- We are using radio wave signals, so we need to be high up to have a clear view - radio waves lose about 60 per cent of their power when they hit a wall.
- In the past, the electrodes transmitted the electrical signal by wires to a receiver and amplifier, and the results were recorded on a continuous roll of paper.
- These units may be placed in either homes or businesses to receive and transmit a wireless broadband signal.
- A fit or seizure happens when there is a brief change or break in the way cells normally send and receive these electrical signals.
- It served as a transmission station to send and receive radio signals from Europe, South America and The United States.
- These chips feature an antenna to transmit and receive radio signals.
- Cochlear implants transmit electrical signals from the inner ear to the brain, which interprets them as sound.
- Marconi was the first to use electromagnetic waves to transmit signals 101 years ago.
- Underlying every thought and bodily motion are nerve and muscle cells sending or receiving electrical signals.
- The implants receive electrical signals from a camera positioned outside the body.
- The pump activated once it received the electrical signal.
- Each cell has a base station that transmits and receives signals over just a small fraction of the frequencies to which the network operator has access.
- The dishes send and receive signals off an orbiting network relay, which transmits messages to and from a central data center.
- These electrical signals send electrical impulses across the skin to an implanted receiver/stimulator in the shoulder to the electrode leads in the arm and hand.
- The development of the electromagnet about 1837 provided the American Samuel F. B. Morse with a way to transmit and receive electric signals.
3An apparatus on a railroad, typically a colored light or a semaphore, giving indications to train engineers of whether or not the line is clear.
（铁路上的）信号灯
Example sentencesExamples
- At one point, we had to stop at an interlocking and the dispatcher couldn't clear the signal because of the train ahead.
- Mitchell said police had yet to determine whether the railway signals and gates were working at the time of the crash.
- By the time they finally achieved rail lock on the bridge and the signals had cleared, there were five southbound trains stuck behind the bridge coming from New York.
- At the Hayward's Heath accident in 1973 the driver misread the signals and drove his loopline train on to the main line and it was struck from behind by an express.
- The strike will affect repairs and fault finding in areas such as signals, train network and level crossings.

verbˈsɪɡnəlˈsiɡnəl

[no object]

1Transmit information or instructions by means of a gesture, action, or sound.
用信号传递信息（或指示）；发信号
hold your fire until I signal
在我发信号之前，一直举着火把。
Example sentencesExamples
- Madoka's father must have handed the parking attendant a tip ahead of time with instructions to signal when Madoka and her mother arrived.
- Cody makes a stupid buzzing sound signaling I had gotten the answer wrong.
- After what seemed like an eternity to Jalen, the hunting horn sounded, signaling in the hunt's end.
- Claire no sooner had entered the EMS station that the bell sounded, signaling that they were needed somewhere to help somebody.
- A glance towards his father signaled he was ready.
- A tone sounded, signaling that the next shift should come to the bridge immediately.
- The car gave a small beeping sound to signal that it was open.
- The captain nodded a little bit as his body swayed gently as a locking sound went through the entire ship signaling that all was secure and the ship was now pressurizing itself.
- It is an error-free link to the application; it will either give good data or keep trying to get good data until it signals that the link is down.
- A buzzer sounded, signaling that the battle was over.
- Somewhere in the distance a bell sounded, signaling that the break was half over.
- You want to signal him that you're going to leave - but the room is too loud.
- At 8: 00 a.m. a rocket sounds off, signaling that the bulls are on the street, and a hush fails over the crowd.
- Settling into his chair, the king waved vaguely at the man to signal him that he could read his missive.
- He and the other men would fly until after dusk, hoping survivors might be trying to signal with a fire.
- The bell sounds, signaling that this particular day of school has officially come to a close.
- Today, when I was leaving work, a woman who works in the division that my department supports signalled me over.
- My first thought was that mother would wave her hand signalling me down to her.
- She stopped at the end of the sidewalk and waited for the sound that signaled she could cross the street.
- Motioning for her to stay around the corner until he signalled, Paris walked towards Blair's cell.
1. 1.1with object and infinitive Instruct (someone) to do something by means of gestures or signs rather than explicit orders.
  （用信号）示意
  she signaled Charlotte to be silent
  她示意夏洛特不要说话。
  Example sentencesExamples
  She gave the thumbs-up sign to her mechanic, signaling him to get out of the way.
  Sasaki held her hand out, signaling Chloe to be quiet.
  Steven stepped closer, signalling me to do or say something, and out the corner of my eye, I saw Paul flinch as though he was ready to throw another punch.
  The siren is wailing, signaling you to pull over.
  He heard the trunk slam shut, signaling him to depart.
  Michele saw Mr. Coltrane excuse himself from the crowd of executives, and wave a hand to her to signal her to join him.
  It's as if we are waiting for a starting gun to signal us to go.
  She stopped at the street corner and waited for the walk sign to turn on and signal her to cross.
  I saw Milgridge waving me toward him, signaling me to run.
  Waving his hand to me, he signaled me to come join him.
  Expressionless except for his puffed cheeks, he blew his whistle twice, signaling us to fall in line behind the school's back door.
  She took his arm, and winked at Rina, signalling her to follow.
  I made motions with my hand signaling Elizabeth to keep it down.
  He waved his hand, signaling someone to go up to the front.
  He leaned back and waved his hand signalling Andrea to go over to him.
  I leaned over and tapped Alyssa on the shoulder, and signaled her to follow me by motioning my head in that direction.
  When he saw Sarah at the window he waved and signaled her to come outside.
  I closed my eyes and nodded, signaling her to go on.
  I wave at him, indirectly signaling him to leave.
  And then, he saw Nathan waving a hand, signaling him to come closer.
  Synonyms
  gesture, sign, give a sign to, indicate, direct, motion, gesticulate
2. 1.2 (of a cyclist, motorist, or vehicle) indicate an intention to turn in a specified direction using an extended arm or flashing indicator.
  （骑自行车者，驾驶司机，交通工具）打信号（以示转向）
  with complement Stone signaled right
  with infinitive the truck signaled to turn left
  卡车打出左转的信号。
  Example sentencesExamples
  Just as I was beginning to worry that my tow truck would never appear, a truck signalled off the highway and came to a stop right behind.
  It may be a split second of indecision at a roundabout, a moment's inattention while pulling out of a parking space, a failure to spot another driver signalling.
  Don't expect other vehicles to signal their intentions - indicators don't necessarily mean they want to turn.
  Kate whipped her Chevy Cavalier into the driveway without signaling as angry motorists honked and yelled obscenities at her.
  When turning into the second of two junctions which are close to each other, the driver should not signal until he has passed the first junction.
  That may lead to the issue of whether he was simply following this tractor trailer too closely or whether, in fact, if the tractor trailer wasn't signaling.
  His report also states that the defendant vehicle signaled and turned left onto Orenda.
  ‘Many do not have any road sense, do not know what and how to signal with hand and are totally indifferent to vehicles in their front and back’.
  While making a right turn at any turning off a main road, you are advised to signal, wait for other vehicles and check your rear view mirror.
3. 1.3 Indicate the existence or occurrence of (something) by actions or sounds.
  （用举动或声音）表示，表明
  with object they could signal displeasure by refusing to cooperate
  该社区可以通过拒绝合作来表明自己的不悦。
  with clause she gave a glance that signaled that her father was being secretive
  她瞥了一眼，暗示她父亲不坦率。
  Example sentencesExamples
  A small bell tinkled above my head, the sound signaling my arrival.
  Dallas seemed to indicate a free-kick but his assistant, Derek Lowe, signalled that the offence had been inside the area.
  Finally the gong sounded, signaling the end of Mihradi's shift.
  For the best part of a century, that clanging sound signalled the abrupt end of an English night out.
  Several metrics likely signaled declining performance and the need to reduce headcount.
  A horn sounded, signalling the arrival of Peter's opponent.
  In fact I was almost sad when the bell sounded signalling the end of lunch.
  A blip sounded off signaling the entry of an intruder.
  Counselors need to understand that the sound of sirens may signal danger to them.
  The sound of crunching leaves signals the closeness of the man and soon enough, the driver's door opens.
  He lifted his head at the sound of voices signalling attention.
  Finally, the gun sounded again, signaling the last lap of the race.
  In the background the drums sounded signaling the end of the dance.
  ‘Students, please rise for the Pledge of Allegiance,’ the loud speaker sounded, signaling the beginning of the announcements.
  In measures 68 and 69, an A-major chord, the dominant of the key, is sounded, signaling the end of the piece.
  Caelyn was grateful when the last bell sounded, signaling the end of school for another day and another week.
  In the third frame, the two clubs combined for four goals before the horn sounded to signal the end of the game.
  The sounds of approaching footsteps signaled the return of the other tourists.
  After this fun, a foghorn sounded to signal the beginning of a ‘self-guided’ walking tour.
  She recognized the sound - it signalled a weapons lock-on.
  Synonyms
  indicate, show, express, communicate

Origin

Late Middle English: from Old French, from medieval Latin signale, neuter of late Latin signalis, from Latin signum ‘mark, token’ (see sign). The verb dates from the early 19th century.

signal²

adjectiveˈsiɡnəlˈsɪɡnəl

attributive Striking in extent, seriousness, or importance; outstanding.
明显的；显著的；显要的；出色的
he attacked the administration for its signal failure of leadership
他攻击政府明显领导无能。
Example sentencesExamples
- One of the signal developments of the past few years is the near-incestuous absorption of media firms by one another.
- Irony is of signal importance in English humour, in everything from radio comedy to literature.
- Although of signal importance in itself, even the characteristic dominance must be seen as a by-product of serum testosterone.
- The ability to create brilliant work over a long period of time is the signal characteristic of Bob Dylan's genius.
- The signal orange color of the shirt was chosen for the same reason it is used where caution is required - it's the most visible color in person, on camera, and on video.
- To some the signal importance of that event was eclipsed by another aspect of the morning's ceremonies.
- In recent years, the signal failures of those systems to reverse years of misguided teachings appear to be dooming the region to years of further conflict.
- It was not until near the end of Freud's life that he began to appreciate the signal importance of the infant's relationship with the mother.
- You can understand why I would have assumed it was Jeffrey Hudson, but all this is a signal lesson as to why you shouldn't jump to such obvious conclusions and look for alternative explanations.
- Irfan Habib, an eminent Marxist historian, is known for his signal contribution to the study of medieval India and the making of the modern Indian state.
Synonyms
notable, noteworthy, remarkable, striking, glaring, outstanding, significant, momentous, memorable, unforgettable, pronounced, marked, obvious

Origin

Early 17th century: from French signalé, from the Italian past participle segnalato ‘distinguished, made illustrious’, from segnale ‘a signal’.

词汇	signal
释义	signal¹ nounPlural signals ˈsɪɡn(ə)lˈsɪɡnəl 1A gesture, action, or sound that is used to convey information or instructions, typically by prearrangement between the parties concerned. 信号；暗号 the firing of the gun was the signal for a chain of beacons to be lit 开枪是接连点燃烽火的信号。 with infinitive the policeman raised his hand as a signal to stop 警察举起手，示意停下。 Example sentencesExamples Anna raised her hand in a signal for Justine to stop. Jumping onto a table, Crush raised her hands in the air as a signal for her friends to stop they were doing; she watched as they obliged, halting their food war. This instruction was a sound signal by a pager, randomly activated by the experimenter via the telephone. Noor, in typical logical mode, made a soft hissing noise with her teeth, the signal for any motion to halt gradually but fast. So we waited for either John our floor warden to let us know what we should do, or for an evacuation signal to sound. Valeo says it can customize the system to notify the driver in other ways, perhaps by sound or a signal on the instrument panel. A signal was sounded in Post Offices across the country and customers were asked to join staff in remembering the dead and injured. This gesture was a signal to his kids that he loved them. Fire alarm signals must be distinctive in sound from other signals. The Prince halted and held up his arm in a signal for the others to stop. She made a signal for him to stop as Mary kept on talking. Rather than rely on conversation, develop hand signals and subtle sounds to communicate with hunting partners while walking or rattling in the woods. She didn't fall too badly and merely got rather wetter than originally planned, but this was the signal for our party to exit the fountain and attempt to dry off. His first shot would be the signal for the rest of his team to open fire. Tired, grumpy, she waved her hand as a signal for me to come in. Casey's head snapped around and she grabbed Alex, making the signal for ‘stop and listen’ with her free hand. When the emergency is over and the all-clear signal is sounded, remember that outside air is still contaminated. With hand signals, she gestured for the rest of the team to follow her into the next hallway, which would lead to the first floor staircase. Most people probably regard smiling, frowning and other such external signals of emotion as gestures that give expression to internal feelings, which come first. Several days later, spotting the crow's nest of the ship over the headland of Cape Evans, they lit a fire as a signal for the ship to steam back and pick them up. Synonyms gesture, sign, wave, gesticulation, cue, prompt, indicator, indication, communication, message alert, warning, tip-off action, movement, motion body language, kinesics 1.1 An indication of a situation. 标志；表示 the markets are waiting for a clear signal about the direction of policy 市场正等待着一个明确的政策动向。 Example sentencesExamples The earlier signals which hinted at the emergence of fiscal prudence, quickly faded out. Pools of all sizes tested gave positive signals indicating that all the pool sizes are amenable for the PCR assay. About 20 minutes later mission control erupted in cheers, hugs and tears when a signal from the craft indicated it was still functioning. But if his signals indicate romance is a no-go, change the channel on your emotions by hanging out more often with other friends. Trouble signals are indicated when a detector becomes too ‘dirty’ to properly function. We have detected signals indicative of hydrothermal activity in several areas, including both basins. Misreading signals can be disastrous in these situations. When the stressful situation ends, hormonal signals switch off the stress response and the body returns to normal. That is a strong signal of the positive move of the SARS situation. Yet that kind of balanced lending is something which bankers who operate without market signals have yet to show much finesse for without clear direction from above. A signal is then produced indicating that the structure is complete and the scaffolding protein detaches to be used again in making other virus tails. This indicates the need for a clear signal to be given early in the New Year that rates are coming down. Controllers had seen a signal indicating a possible problem with the capsule's heat shield, so I was advised to keep the retrorocket pack attached to hold the heat shield in place. The data on rising earnings comes amid conflicting signals about the job situation for technology professionals in the United States. The figures provided positive signals on the state of the economy, with tax receipts from wages, consumer spending and stamp duty all ahead. Education Leeds assistant chief executive Roland Absalom said it was a clear signal that the situation was improving. One possible benefit of mate choice occurs if females can use male courtship signals as an honest indicator of male nutritional contributions at mating, nuptial gifts. Stress signals indicated that he needed to create a more balanced life, to keep divorce and a heart attack at bay. That may indicate that incoming pain signals are being delivered by the spinal cord in a similar way for different people, but once they arrive in the brain they are handled differently. It's too early to predict what might happen in the case of nanotechnology, but early signals indicate Congress is eager to tie strings to funding. Synonyms indication, sign, symptom, hint, pointer, suggestion, intimation, clue, manifestation, demonstration token, testimony, evidence, attestation, proof 1.2 An event or statement that provides the impulse for an occurrence. 起因；导火线 the champion's announcement that he was retiring was the signal for scores of journalists to gather at his last match 这位冠军宣布他将退役，这就是那么多记者出席他最后一场比赛的原因。 Example sentencesExamples A certain amount of inflation is needed anyway to provide market signals to increase production and investment. For patients, monitoring may provide a signal for action or simply provide motivation to adhere to treatment. In the fruit fly Drosophila melanogaster, the X: A ratio serves as the primary signal for somatic sex determination. When Sheffield saw a player dismissed for two yellow card offences it was the signal for Vale to press forward again. Gerard Rice made it 2-1 for Newcastle midway through the second half, a signal for the Seasiders to turn up the pressure. The oxidative stress caused by ozone may serve as the initial signal for programmed cell death and a hypersensitive response. A drop in the intracellular concentration of glutamine provides a signal for the activation of transcription of nitrogen-regulated genes. Their success has been a signal for other Aboriginal communities to follow suit. However, we have noticed that there is a temporal increase in these mutations which should serve us a warning signal for prescribing the SP treatment. It has been hypothesized that the products of two different sex alleles may form an active heterodimer that serves as an unambiguous signal for sex determination. Synonyms cue, prompt, occasion, green light, incentive, impetus, impulse, stimulus informal go-ahead 1.3Bridge A prearranged convention of bidding or play intended to convey information to one's partner. 〔桥牌〕信号 Example sentencesExamples Therefore it is normal for the first two players to use the low bids as signals. When leading to a trick, certain remarks or signals are allowed. When playing against a trump contract this can be achieved by a simple system of discard signals. Make an agreement with your partner to look for the signal after each time that the cards are swept away. Naturally they will try to do this while the opponents are not looking, but as the signals do not need to be true, you can also try to confuse the opponents by passing misleading signals, at the risk of confusing your partner as well. 2An electrical impulse or radio wave transmitted or received. （电脉冲或无线电波传递或接收的）信号 equipment for receiving TV signals 接收电视信号的设备。 Example sentencesExamples It served as a transmission station to send and receive radio signals from Europe, South America and The United States. Cochlear implants transmit electrical signals from the inner ear to the brain, which interprets them as sound. Each antenna, starting at a different moment, sends out its own signals on regular radio waves. Marconi was the first to use electromagnetic waves to transmit signals 101 years ago. These tags transmit and receive radio signals to and from nearby scanners. These chips feature an antenna to transmit and receive radio signals. These units may be placed in either homes or businesses to receive and transmit a wireless broadband signal. These electrical signals send electrical impulses across the skin to an implanted receiver/stimulator in the shoulder to the electrode leads in the arm and hand. The dishes send and receive signals off an orbiting network relay, which transmits messages to and from a central data center. Underlying every thought and bodily motion are nerve and muscle cells sending or receiving electrical signals. A fit or seizure happens when there is a brief change or break in the way cells normally send and receive these electrical signals. In the past, the electrodes transmitted the electrical signal by wires to a receiver and amplifier, and the results were recorded on a continuous roll of paper. The pump activated once it received the electrical signal. The implants receive electrical signals from a camera positioned outside the body. Each cell has a base station that transmits and receives signals over just a small fraction of the frequencies to which the network operator has access. The development of the electromagnet about 1837 provided the American Samuel F. B. Morse with a way to transmit and receive electric signals. Speech and other sounds are sent to the speech processor where they are converted into electrical signals and sent to the transmitting coil. We are using radio wave signals, so we need to be high up to have a clear view - radio waves lose about 60 per cent of their power when they hit a wall. Because the signal is transmitted over radio waves, others can listen in to any transmissions, so the authentication mechanisms are also visible. The problem is that forks in the electrical grid reflect broadband signals and thereby degrade transmission. 3An apparatus on a railway, typically a coloured light or a semaphore, giving indications to train drivers of whether or not the line is clear. （铁路上的）信号灯 the driver of the mail train overran a signal at danger and ran into the rear of an express Example sentencesExamples Mitchell said police had yet to determine whether the railway signals and gates were working at the time of the crash. The strike will affect repairs and fault finding in areas such as signals, train network and level crossings. At one point, we had to stop at an interlocking and the dispatcher couldn't clear the signal because of the train ahead. At the Hayward's Heath accident in 1973 the driver misread the signals and drove his loopline train on to the main line and it was struck from behind by an express. By the time they finally achieved rail lock on the bridge and the signals had cleared, there were five southbound trains stuck behind the bridge coming from New York. verbsignalling, signalled, signals, signaled, signaling ˈsɪɡn(ə)lˈsɪɡnəl [no object] 1Convey information or instructions by means of a gesture, action, or sound. 用信号传递信息（或指示）；发信号 hold your fire until I signal 在我发信号之前，一直举着火把。 Example sentencesExamples After what seemed like an eternity to Jalen, the hunting horn sounded, signaling in the hunt's end. My first thought was that mother would wave her hand signalling me down to her. It is an error-free link to the application; it will either give good data or keep trying to get good data until it signals that the link is down. You want to signal him that you're going to leave - but the room is too loud. A buzzer sounded, signaling that the battle was over. Cody makes a stupid buzzing sound signaling I had gotten the answer wrong. Somewhere in the distance a bell sounded, signaling that the break was half over. At 8: 00 a.m. a rocket sounds off, signaling that the bulls are on the street, and a hush fails over the crowd. Motioning for her to stay around the corner until he signalled, Paris walked towards Blair's cell. The car gave a small beeping sound to signal that it was open. She stopped at the end of the sidewalk and waited for the sound that signaled she could cross the street. A tone sounded, signaling that the next shift should come to the bridge immediately. The captain nodded a little bit as his body swayed gently as a locking sound went through the entire ship signaling that all was secure and the ship was now pressurizing itself. Today, when I was leaving work, a woman who works in the division that my department supports signalled me over. He and the other men would fly until after dusk, hoping survivors might be trying to signal with a fire. A glance towards his father signaled he was ready. The bell sounds, signaling that this particular day of school has officially come to a close. Claire no sooner had entered the EMS station that the bell sounded, signaling that they were needed somewhere to help somebody. Settling into his chair, the king waved vaguely at the man to signal him that he could read his missive. Madoka's father must have handed the parking attendant a tip ahead of time with instructions to signal when Madoka and her mother arrived. 1.1with object and infinitive Instruct (someone) to do something by means of gestures or signs. （用信号）示意 she signalled Charlotte to be silent 她示意夏洛特不要说话。 Example sentencesExamples When he saw Sarah at the window he waved and signaled her to come outside. I closed my eyes and nodded, signaling her to go on. She took his arm, and winked at Rina, signalling her to follow. And then, he saw Nathan waving a hand, signaling him to come closer. Michele saw Mr. Coltrane excuse himself from the crowd of executives, and wave a hand to her to signal her to join him. I wave at him, indirectly signaling him to leave. Steven stepped closer, signalling me to do or say something, and out the corner of my eye, I saw Paul flinch as though he was ready to throw another punch. He leaned back and waved his hand signalling Andrea to go over to him. The siren is wailing, signaling you to pull over. She stopped at the street corner and waited for the walk sign to turn on and signal her to cross. She gave the thumbs-up sign to her mechanic, signaling him to get out of the way. I leaned over and tapped Alyssa on the shoulder, and signaled her to follow me by motioning my head in that direction. He heard the trunk slam shut, signaling him to depart. Sasaki held her hand out, signaling Chloe to be quiet. I made motions with my hand signaling Elizabeth to keep it down. Expressionless except for his puffed cheeks, he blew his whistle twice, signaling us to fall in line behind the school's back door. He waved his hand, signaling someone to go up to the front. It's as if we are waiting for a starting gun to signal us to go. I saw Milgridge waving me toward him, signaling me to run. Waving his hand to me, he signaled me to come join him. Synonyms gesture, sign, give a sign to, indicate, direct, motion, gesticulate wave, beckon, nod 1.2 (of a cyclist, motorist, or vehicle) indicate an intention to turn in a specified direction using an extended arm or flashing indicator. （骑自行车者，驾驶司机，交通工具）打信号（以示转向） with complement Stone signalled right 斯通打出右转的信号。 with infinitive the truck signalled to turn left 卡车打出左转的信号。 Example sentencesExamples That may lead to the issue of whether he was simply following this tractor trailer too closely or whether, in fact, if the tractor trailer wasn't signaling. While making a right turn at any turning off a main road, you are advised to signal, wait for other vehicles and check your rear view mirror. When turning into the second of two junctions which are close to each other, the driver should not signal until he has passed the first junction. Just as I was beginning to worry that my tow truck would never appear, a truck signalled off the highway and came to a stop right behind. His report also states that the defendant vehicle signaled and turned left onto Orenda. Kate whipped her Chevy Cavalier into the driveway without signaling as angry motorists honked and yelled obscenities at her. Don't expect other vehicles to signal their intentions - indicators don't necessarily mean they want to turn. ‘Many do not have any road sense, do not know what and how to signal with hand and are totally indifferent to vehicles in their front and back’. It may be a split second of indecision at a roundabout, a moment's inattention while pulling out of a parking space, a failure to spot another driver signalling. 1.3with object Indicate the existence or occurrence of (something) by actions or sounds. （用举动或声音）表示，表明 the Community could signal displeasure by refusing to cooperate 该社区可以通过拒绝合作来表明自己的不悦。 with clause she gave a glance which signalled that her father was being secretive 她瞥了一眼，暗示她父亲不坦率。 Example sentencesExamples In the third frame, the two clubs combined for four goals before the horn sounded to signal the end of the game. The sounds of approaching footsteps signaled the return of the other tourists. The sound of crunching leaves signals the closeness of the man and soon enough, the driver's door opens. A blip sounded off signaling the entry of an intruder. A small bell tinkled above my head, the sound signaling my arrival. After this fun, a foghorn sounded to signal the beginning of a ‘self-guided’ walking tour. In the background the drums sounded signaling the end of the dance. A horn sounded, signalling the arrival of Peter's opponent. For the best part of a century, that clanging sound signalled the abrupt end of an English night out. Dallas seemed to indicate a free-kick but his assistant, Derek Lowe, signalled that the offence had been inside the area. Caelyn was grateful when the last bell sounded, signaling the end of school for another day and another week. In measures 68 and 69, an A-major chord, the dominant of the key, is sounded, signaling the end of the piece. Finally, the gun sounded again, signaling the last lap of the race. Several metrics likely signaled declining performance and the need to reduce headcount. In fact I was almost sad when the bell sounded signalling the end of lunch. She recognized the sound - it signalled a weapons lock-on. Counselors need to understand that the sound of sirens may signal danger to them. He lifted his head at the sound of voices signalling attention. Finally the gong sounded, signaling the end of Mihradi's shift. ‘Students, please rise for the Pledge of Allegiance,’ the loud speaker sounded, signaling the beginning of the announcements. Synonyms indicate, show, express, communicate announce, proclaim, declare, pronounce Derivatives signaller noun ˈsɪɡnələ Stockport No 2 signal box, built in the 1870s, has 60 levers and is operated manually by two signallers using a system of bells and flashing lights. Example sentencesExamples The event on Saturday was aimed at highlighting the 15,000 jobs in more than 140 trades which the Army has to offer, with engineers, signallers, guardsmen and mechanics among those on hand to talk to young people and their families. Thousands of drivers, signallers and maintenance workers walked out from 6.30 pm yesterday causing the worst travel disruption in the capital for two years. About 300 engineers and 700 signallers will be recruited from school leavers, graduates, those who took early retirement, people returning from a career break and professional engineers. The equipment is needed to allow rail staff in the Sheffield area, including signallers, to speak to one another. Origin Late Middle English: from Old French, from medieval Latin signale, neuter of late Latin signalis, from Latin signum 'mark, token' (see sign). The verb dates from the early 19th century. Rhymes spignel signal² adjective ˈsɪɡn(ə)lˈsɪɡnəl attributive Striking in extent, seriousness, or importance; outstanding. 明显的；显著的；显要的；出色的 he attacked the government for their signal failure of leadership 他攻击政府明显领导无能。 Example sentencesExamples Irony is of signal importance in English humour, in everything from radio comedy to literature. To some the signal importance of that event was eclipsed by another aspect of the morning's ceremonies. In recent years, the signal failures of those systems to reverse years of misguided teachings appear to be dooming the region to years of further conflict. Irfan Habib, an eminent Marxist historian, is known for his signal contribution to the study of medieval India and the making of the modern Indian state. Although of signal importance in itself, even the characteristic dominance must be seen as a by-product of serum testosterone. One of the signal developments of the past few years is the near-incestuous absorption of media firms by one another. The signal orange color of the shirt was chosen for the same reason it is used where caution is required - it's the most visible color in person, on camera, and on video. The ability to create brilliant work over a long period of time is the signal characteristic of Bob Dylan's genius. It was not until near the end of Freud's life that he began to appreciate the signal importance of the infant's relationship with the mother. You can understand why I would have assumed it was Jeffrey Hudson, but all this is a signal lesson as to why you shouldn't jump to such obvious conclusions and look for alternative explanations. Synonyms notable, noteworthy, remarkable, striking, glaring, outstanding, significant, momentous, memorable, unforgettable, pronounced, marked, obvious impressive, distinguished, uncommon, unusual, particular, special, extraordinary, exceptional, conspicuous, rare Derivatives signally adverb ˈsɪɡnəliˈsɪɡnəli The Merovingians had signally failed to rule other peoples, or even themselves, and it was this system that Charles had inherited. Example sentencesExamples It's made me think hard about the moments where my own leadership has been signally lacking. By 1932 the gold standard had strayed so far from purity, so far from what it could and should have been, that its weakness contributed signally to its final breakdown in 1933. What is it that the fourth increase in interest rates is likely to achieve where the previous three have so signally failed? But he signally failed to sort out rates of migration to these islands, which have peaked after being consistently low for a quarter-century. Origin Early 17th century: from French signalé, from the Italian past participle segnalato 'distinguished, made illustrious', from segnale 'a signal'. noun.1 adj.1 signal¹ nounˈsɪɡnəlˈsiɡnəl 1A gesture, action, or sound that is used to convey information or instructions, typically by prearrangement between the parties concerned. 信号；暗号 the firing of the gun was the signal for a chain of beacons to be lit 开枪是接连点燃烽火的信号。 with infinitive the policeman raised his hand as a signal to stop 警察举起手，示意停下。 Example sentencesExamples Most people probably regard smiling, frowning and other such external signals of emotion as gestures that give expression to internal feelings, which come first. Anna raised her hand in a signal for Justine to stop. With hand signals, she gestured for the rest of the team to follow her into the next hallway, which would lead to the first floor staircase. Rather than rely on conversation, develop hand signals and subtle sounds to communicate with hunting partners while walking or rattling in the woods. Valeo says it can customize the system to notify the driver in other ways, perhaps by sound or a signal on the instrument panel. She made a signal for him to stop as Mary kept on talking. Several days later, spotting the crow's nest of the ship over the headland of Cape Evans, they lit a fire as a signal for the ship to steam back and pick them up. Fire alarm signals must be distinctive in sound from other signals. The Prince halted and held up his arm in a signal for the others to stop. A signal was sounded in Post Offices across the country and customers were asked to join staff in remembering the dead and injured. His first shot would be the signal for the rest of his team to open fire. Jumping onto a table, Crush raised her hands in the air as a signal for her friends to stop they were doing; she watched as they obliged, halting their food war. So we waited for either John our floor warden to let us know what we should do, or for an evacuation signal to sound. Noor, in typical logical mode, made a soft hissing noise with her teeth, the signal for any motion to halt gradually but fast. This instruction was a sound signal by a pager, randomly activated by the experimenter via the telephone. Casey's head snapped around and she grabbed Alex, making the signal for ‘stop and listen’ with her free hand. This gesture was a signal to his kids that he loved them. When the emergency is over and the all-clear signal is sounded, remember that outside air is still contaminated. Tired, grumpy, she waved her hand as a signal for me to come in. She didn't fall too badly and merely got rather wetter than originally planned, but this was the signal for our party to exit the fountain and attempt to dry off. Synonyms gesture, sign, wave, gesticulation, cue, prompt, indicator, indication, communication, message 1.1 An indication of a state of affairs. 标志；表示 the markets are waiting for a clear signal about the direction of policy 市场正等待着一个明确的政策动向。 Example sentencesExamples Yet that kind of balanced lending is something which bankers who operate without market signals have yet to show much finesse for without clear direction from above. The earlier signals which hinted at the emergence of fiscal prudence, quickly faded out. One possible benefit of mate choice occurs if females can use male courtship signals as an honest indicator of male nutritional contributions at mating, nuptial gifts. This indicates the need for a clear signal to be given early in the New Year that rates are coming down. About 20 minutes later mission control erupted in cheers, hugs and tears when a signal from the craft indicated it was still functioning. Controllers had seen a signal indicating a possible problem with the capsule's heat shield, so I was advised to keep the retrorocket pack attached to hold the heat shield in place. Trouble signals are indicated when a detector becomes too ‘dirty’ to properly function. It's too early to predict what might happen in the case of nanotechnology, but early signals indicate Congress is eager to tie strings to funding. Misreading signals can be disastrous in these situations. That may indicate that incoming pain signals are being delivered by the spinal cord in a similar way for different people, but once they arrive in the brain they are handled differently. A signal is then produced indicating that the structure is complete and the scaffolding protein detaches to be used again in making other virus tails. But if his signals indicate romance is a no-go, change the channel on your emotions by hanging out more often with other friends. The data on rising earnings comes amid conflicting signals about the job situation for technology professionals in the United States. That is a strong signal of the positive move of the SARS situation. Stress signals indicated that he needed to create a more balanced life, to keep divorce and a heart attack at bay. Pools of all sizes tested gave positive signals indicating that all the pool sizes are amenable for the PCR assay. Education Leeds assistant chief executive Roland Absalom said it was a clear signal that the situation was improving. We have detected signals indicative of hydrothermal activity in several areas, including both basins. The figures provided positive signals on the state of the economy, with tax receipts from wages, consumer spending and stamp duty all ahead. When the stressful situation ends, hormonal signals switch off the stress response and the body returns to normal. Synonyms indication, sign, symptom, hint, pointer, suggestion, intimation, clue, manifestation, demonstration 1.2 An event or statement that provides the impulse or occasion for something specified to happen. 起因；导火线 the champion's announcement that he was retiring was the signal for scores of journalists to gather at his last match 这位冠军宣布他将退役，这就是那么多记者出席他最后一场比赛的原因。 Example sentencesExamples When Sheffield saw a player dismissed for two yellow card offences it was the signal for Vale to press forward again. Gerard Rice made it 2-1 for Newcastle midway through the second half, a signal for the Seasiders to turn up the pressure. It has been hypothesized that the products of two different sex alleles may form an active heterodimer that serves as an unambiguous signal for sex determination. Their success has been a signal for other Aboriginal communities to follow suit. In the fruit fly Drosophila melanogaster, the X: A ratio serves as the primary signal for somatic sex determination. However, we have noticed that there is a temporal increase in these mutations which should serve us a warning signal for prescribing the SP treatment. For patients, monitoring may provide a signal for action or simply provide motivation to adhere to treatment. A certain amount of inflation is needed anyway to provide market signals to increase production and investment. The oxidative stress caused by ozone may serve as the initial signal for programmed cell death and a hypersensitive response. A drop in the intracellular concentration of glutamine provides a signal for the activation of transcription of nitrogen-regulated genes. Synonyms cue, prompt, occasion, green light, incentive, impetus, impulse, stimulus 1.3Bridge A prearranged convention of bidding or play intended to convey information to one's partner. 〔桥牌〕信号 Example sentencesExamples When leading to a trick, certain remarks or signals are allowed. When playing against a trump contract this can be achieved by a simple system of discard signals. Make an agreement with your partner to look for the signal after each time that the cards are swept away. Naturally they will try to do this while the opponents are not looking, but as the signals do not need to be true, you can also try to confuse the opponents by passing misleading signals, at the risk of confusing your partner as well. Therefore it is normal for the first two players to use the low bids as signals. 2An electrical impulse or radio wave transmitted or received. （电脉冲或无线电波传递或接收的）信号 equipment for receiving TV signals 接收电视信号的设备。 Example sentencesExamples Because the signal is transmitted over radio waves, others can listen in to any transmissions, so the authentication mechanisms are also visible. These tags transmit and receive radio signals to and from nearby scanners. Speech and other sounds are sent to the speech processor where they are converted into electrical signals and sent to the transmitting coil. The problem is that forks in the electrical grid reflect broadband signals and thereby degrade transmission. Each antenna, starting at a different moment, sends out its own signals on regular radio waves. We are using radio wave signals, so we need to be high up to have a clear view - radio waves lose about 60 per cent of their power when they hit a wall. In the past, the electrodes transmitted the electrical signal by wires to a receiver and amplifier, and the results were recorded on a continuous roll of paper. These units may be placed in either homes or businesses to receive and transmit a wireless broadband signal. A fit or seizure happens when there is a brief change or break in the way cells normally send and receive these electrical signals. It served as a transmission station to send and receive radio signals from Europe, South America and The United States. These chips feature an antenna to transmit and receive radio signals. Cochlear implants transmit electrical signals from the inner ear to the brain, which interprets them as sound. Marconi was the first to use electromagnetic waves to transmit signals 101 years ago. Underlying every thought and bodily motion are nerve and muscle cells sending or receiving electrical signals. The implants receive electrical signals from a camera positioned outside the body. The pump activated once it received the electrical signal. Each cell has a base station that transmits and receives signals over just a small fraction of the frequencies to which the network operator has access. The dishes send and receive signals off an orbiting network relay, which transmits messages to and from a central data center. These electrical signals send electrical impulses across the skin to an implanted receiver/stimulator in the shoulder to the electrode leads in the arm and hand. The development of the electromagnet about 1837 provided the American Samuel F. B. Morse with a way to transmit and receive electric signals. 3An apparatus on a railroad, typically a colored light or a semaphore, giving indications to train engineers of whether or not the line is clear. （铁路上的）信号灯 Example sentencesExamples At one point, we had to stop at an interlocking and the dispatcher couldn't clear the signal because of the train ahead. Mitchell said police had yet to determine whether the railway signals and gates were working at the time of the crash. By the time they finally achieved rail lock on the bridge and the signals had cleared, there were five southbound trains stuck behind the bridge coming from New York. At the Hayward's Heath accident in 1973 the driver misread the signals and drove his loopline train on to the main line and it was struck from behind by an express. The strike will affect repairs and fault finding in areas such as signals, train network and level crossings. verbˈsɪɡnəlˈsiɡnəl [no object] 1Transmit information or instructions by means of a gesture, action, or sound. 用信号传递信息（或指示）；发信号 hold your fire until I signal 在我发信号之前，一直举着火把。 Example sentencesExamples Madoka's father must have handed the parking attendant a tip ahead of time with instructions to signal when Madoka and her mother arrived. Cody makes a stupid buzzing sound signaling I had gotten the answer wrong. After what seemed like an eternity to Jalen, the hunting horn sounded, signaling in the hunt's end. Claire no sooner had entered the EMS station that the bell sounded, signaling that they were needed somewhere to help somebody. A glance towards his father signaled he was ready. A tone sounded, signaling that the next shift should come to the bridge immediately. The car gave a small beeping sound to signal that it was open. The captain nodded a little bit as his body swayed gently as a locking sound went through the entire ship signaling that all was secure and the ship was now pressurizing itself. It is an error-free link to the application; it will either give good data or keep trying to get good data until it signals that the link is down. A buzzer sounded, signaling that the battle was over. Somewhere in the distance a bell sounded, signaling that the break was half over. You want to signal him that you're going to leave - but the room is too loud. At 8: 00 a.m. a rocket sounds off, signaling that the bulls are on the street, and a hush fails over the crowd. Settling into his chair, the king waved vaguely at the man to signal him that he could read his missive. He and the other men would fly until after dusk, hoping survivors might be trying to signal with a fire. The bell sounds, signaling that this particular day of school has officially come to a close. Today, when I was leaving work, a woman who works in the division that my department supports signalled me over. My first thought was that mother would wave her hand signalling me down to her. She stopped at the end of the sidewalk and waited for the sound that signaled she could cross the street. Motioning for her to stay around the corner until he signalled, Paris walked towards Blair's cell. 1.1with object and infinitive Instruct (someone) to do something by means of gestures or signs rather than explicit orders. （用信号）示意 she signaled Charlotte to be silent 她示意夏洛特不要说话。 Example sentencesExamples She gave the thumbs-up sign to her mechanic, signaling him to get out of the way. Sasaki held her hand out, signaling Chloe to be quiet. Steven stepped closer, signalling me to do or say something, and out the corner of my eye, I saw Paul flinch as though he was ready to throw another punch. The siren is wailing, signaling you to pull over. He heard the trunk slam shut, signaling him to depart. Michele saw Mr. Coltrane excuse himself from the crowd of executives, and wave a hand to her to signal her to join him. It's as if we are waiting for a starting gun to signal us to go. She stopped at the street corner and waited for the walk sign to turn on and signal her to cross. I saw Milgridge waving me toward him, signaling me to run. Waving his hand to me, he signaled me to come join him. Expressionless except for his puffed cheeks, he blew his whistle twice, signaling us to fall in line behind the school's back door. She took his arm, and winked at Rina, signalling her to follow. I made motions with my hand signaling Elizabeth to keep it down. He waved his hand, signaling someone to go up to the front. He leaned back and waved his hand signalling Andrea to go over to him. I leaned over and tapped Alyssa on the shoulder, and signaled her to follow me by motioning my head in that direction. When he saw Sarah at the window he waved and signaled her to come outside. I closed my eyes and nodded, signaling her to go on. I wave at him, indirectly signaling him to leave. And then, he saw Nathan waving a hand, signaling him to come closer. Synonyms gesture, sign, give a sign to, indicate, direct, motion, gesticulate 1.2 (of a cyclist, motorist, or vehicle) indicate an intention to turn in a specified direction using an extended arm or flashing indicator. （骑自行车者，驾驶司机，交通工具）打信号（以示转向） with complement Stone signaled right with infinitive the truck signaled to turn left 卡车打出左转的信号。 Example sentencesExamples Just as I was beginning to worry that my tow truck would never appear, a truck signalled off the highway and came to a stop right behind. It may be a split second of indecision at a roundabout, a moment's inattention while pulling out of a parking space, a failure to spot another driver signalling. Don't expect other vehicles to signal their intentions - indicators don't necessarily mean they want to turn. Kate whipped her Chevy Cavalier into the driveway without signaling as angry motorists honked and yelled obscenities at her. When turning into the second of two junctions which are close to each other, the driver should not signal until he has passed the first junction. That may lead to the issue of whether he was simply following this tractor trailer too closely or whether, in fact, if the tractor trailer wasn't signaling. His report also states that the defendant vehicle signaled and turned left onto Orenda. ‘Many do not have any road sense, do not know what and how to signal with hand and are totally indifferent to vehicles in their front and back’. While making a right turn at any turning off a main road, you are advised to signal, wait for other vehicles and check your rear view mirror. 1.3 Indicate the existence or occurrence of (something) by actions or sounds. （用举动或声音）表示，表明 with object they could signal displeasure by refusing to cooperate 该社区可以通过拒绝合作来表明自己的不悦。 with clause she gave a glance that signaled that her father was being secretive 她瞥了一眼，暗示她父亲不坦率。 Example sentencesExamples A small bell tinkled above my head, the sound signaling my arrival. Dallas seemed to indicate a free-kick but his assistant, Derek Lowe, signalled that the offence had been inside the area. Finally the gong sounded, signaling the end of Mihradi's shift. For the best part of a century, that clanging sound signalled the abrupt end of an English night out. Several metrics likely signaled declining performance and the need to reduce headcount. A horn sounded, signalling the arrival of Peter's opponent. In fact I was almost sad when the bell sounded signalling the end of lunch. A blip sounded off signaling the entry of an intruder. Counselors need to understand that the sound of sirens may signal danger to them. The sound of crunching leaves signals the closeness of the man and soon enough, the driver's door opens. He lifted his head at the sound of voices signalling attention. Finally, the gun sounded again, signaling the last lap of the race. In the background the drums sounded signaling the end of the dance. ‘Students, please rise for the Pledge of Allegiance,’ the loud speaker sounded, signaling the beginning of the announcements. In measures 68 and 69, an A-major chord, the dominant of the key, is sounded, signaling the end of the piece. Caelyn was grateful when the last bell sounded, signaling the end of school for another day and another week. In the third frame, the two clubs combined for four goals before the horn sounded to signal the end of the game. The sounds of approaching footsteps signaled the return of the other tourists. After this fun, a foghorn sounded to signal the beginning of a ‘self-guided’ walking tour. She recognized the sound - it signalled a weapons lock-on. Synonyms indicate, show, express, communicate Origin Late Middle English: from Old French, from medieval Latin signale, neuter of late Latin signalis, from Latin signum ‘mark, token’ (see sign). The verb dates from the early 19th century. signal² adjectiveˈsiɡnəlˈsɪɡnəl attributive Striking in extent, seriousness, or importance; outstanding. 明显的；显著的；显要的；出色的 he attacked the administration for its signal failure of leadership 他攻击政府明显领导无能。 Example sentencesExamples One of the signal developments of the past few years is the near-incestuous absorption of media firms by one another. Irony is of signal importance in English humour, in everything from radio comedy to literature. Although of signal importance in itself, even the characteristic dominance must be seen as a by-product of serum testosterone. The ability to create brilliant work over a long period of time is the signal characteristic of Bob Dylan's genius. The signal orange color of the shirt was chosen for the same reason it is used where caution is required - it's the most visible color in person, on camera, and on video. To some the signal importance of that event was eclipsed by another aspect of the morning's ceremonies. In recent years, the signal failures of those systems to reverse years of misguided teachings appear to be dooming the region to years of further conflict. It was not until near the end of Freud's life that he began to appreciate the signal importance of the infant's relationship with the mother. You can understand why I would have assumed it was Jeffrey Hudson, but all this is a signal lesson as to why you shouldn't jump to such obvious conclusions and look for alternative explanations. Irfan Habib, an eminent Marxist historian, is known for his signal contribution to the study of medieval India and the making of the modern Indian state. Synonyms notable, noteworthy, remarkable, striking, glaring, outstanding, significant, momentous, memorable, unforgettable, pronounced, marked, obvious Origin Early 17th century: from French signalé, from the Italian past participle segnalato ‘distinguished, made illustrious’, from segnale ‘a signal’. noun.1 adj.1
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