Definition of clearance in English:

clearance

noun ˈklɪər(ə)nsˈklɪrəns

mass noun

1The action or process of clearing or of being dispersed.
清除
cleaning of the machine should include clearance of blockages
清洁机器应包括阻塞物的清除。
there will be sunny intervals after clearance of any early mist
早晨的薄雾散后，会时不时出太阳。
Example sentencesExamples
- This clearance was mediated by both active and passive transport processes.
- The school gives training in both ship diving and clearance diving.
- Take a brisk stroll through the mall and catch the holiday clearance sale.
- This includes bridge building, mine clearance, water supply, bulk fuels, route maintenance and field defences.
- The navy clearance diving team will be home in late May.
- She and I headed straight for the clearance rack, talking as we went.
- Future work will include repairs to rural roads and road bridges and clearance of debris from waterways.
- When all pedestrians are agile and complete their crossing early in the clearance interval, vehicles can continue through the crossing without waiting for the green signal.
- This ability of the kidneys to get rid of excess water from the body is called ‘free water clearance.’
- However this clearance has not reduced the level of threat to civilian populations and relief agencies as it was aimed at facilitating the military advance.
- And on a more everyday level, clearance rates - the percentage of crimes resolved by police - are up across the board.
- If mucociliary clearance is impaired, colonization is followed by rapid replication and clinical infection.
- Other alternative airway clearance techniques may involve handheld devices to assist with mobilizing the secretions.
- Factors that may limit the usefulness of tanks in clearance operations include the following.
- The clearance interval is signalled to pedestrians by a flashing red signal, which is displayed using the same lantern and the same standing person symbol as the steady red prohibition signal.
- The other available demining strategies include clearance, destruction of stockpiles and the universalisation of the concept of the convention.
- I patronize the clearance racks and the department store sales.
Synonyms
destruction, knocking down, pulling down, tearing down, flattening, razing, levelling, bulldozing
1. 1.1 The removal of buildings, people, or trees from land so as to free it for alternative uses.
  拆迁，清空
  slum clearance accelerated during the 1960s
  20世纪60年代贫民窟拆迁加速了。
  count noun forest clearances
  清林。
  Example sentencesExamples
  ‘We need government assistance to overcome forest theft and farm clearance as we can't do it alone,’ he urged.
  She aids him in everything from land clearance to castle building.
  Work started in spring of last year, with demolition, clearance and work to the new road lay-out.
  This encompasses securing the site perimeter, demolition and site clearance, flood defences, sheet piling, public riverside promenade and plaza.
  Two hundred years ago the roe deer was extinct in England and Wales, the victim of over-hunting and forest clearance.
  Work on the site, including demolition and clearance, will begin towards the end of this month.
  In this extensive process of clearance 40 graves were encountered and all of them opened.
  The latest figures show the rate of forest clearance in the Amazon last year was the second highest on record.
  The main threats now are the continuing effects of Dutch elm disease, clearance of mature trees and pollution from the spray drift of agrochemicals.
  Options include total demolition with redevelopment, total renovation or partial clearance and renovation.
  The extensive sale of royal forests and land clearance for agriculture also had their effect on the oaks.
  The rebuilding costs automatically include an allowance for full central heating costs, demolition and site clearance as well as architect and surveyor fees.
  It will become a criminal offence to carry out damaging works such as road building, tree clearance or pond drainage without the consent of English Nature.
  The argument that the phrase referred only to building operations of a constructional nature and not to operations consisting in demolitions or site clearance was rejected.
  From the 5th to the 12th centuries, agricultural land was created by forest clearance, or was reclaimed from marshland and the sea.
  Traditional preferences together with modern equipment have resulted in the accelerated clearance of old growth forests.
  In Greece, forest clearance and population increases led to severe soil erosion in the period 4000 to 3000 BC.
  However, even in Amazonia, clearance is not a one-way process; for every 3 ha cleared, perhaps one is reclaimed by forest regeneration.
  But juniper trees were cut down during land clearances and for fuel.
  They say the programme of tree felling and undergrowth clearance is being carried out at the wrong time of year, disturbing kingfishers, otters and bats.
  Synonyms
  removal, clearing, clear-out, demolition
2. 1.2 The removal of contents from a house.
  （房屋的）清空
  the sheriff's officers supervised the house clearance
  司法官员们监督房子的清空。
  count noun antiques wanted and clearances undertaken
  古董须保留，房屋须清空。
  Example sentencesExamples
  The item has been in the family of the unnamed Boltonian since an ancestor picked it up as part of a house clearance at the home of the deceased Forth Earl of Egremont in the 19th Century.
  The staff give up their time free of charge and the charity raises money to run the workshop selling the ornaments left over from house clearances.
  But it was slightly puzzling that the album, believed to have been sold on through car boot sales and discarded during a house clearance, had been found in Liverpool, he added.
  The house clearance, which will be filmed for the television show, will be held between 1.30 pm and 5pm.
  That was because the fishmonger did house clearances on a Monday and never had time to unload the odds and ends floating about in the back of the van.
  As a last resort we can call in a house clearance agent but, frankly, I'd rather give it away than do that.
  He also runs a second hand shop and a house clearance business, and his next task is to raise £600,000 for a new running track.
  It also has two vans which provide a furniture service and a shop which sells smaller items from house clearances to raise funds.
  There must be one at one of those house clearance places, and it suddenly occurred to me that it was a slightly better storage solution than stacking my stuff behind a chair.
  It bore no reference to where the dead men were from, but after some initial digging, he discovered it had come from a house clearance in Rawmarsh.
  He said the case had been found during a house clearance by another auctioneer, who passed it on to them to sell for a client.
  If anyone is selling one, or giving one away in a house clearance, could they either contact me or leave an advertisement in the front page classified column of the Times.
  The auctioneers turned what was essentially a house clearance into a must-go event.
  You would think it rather hard to acquire old cigarette packets, but they turn up, quite surprisingly, in house clearances, when attics are sorted out, or when old shops are closed down and the cellars are emptied.
  During a house clearance, a 1948 programme for a concert at Sheffield City Hall, signed by Prime Minister of the day, Anthony Eden, was found.
  The boss of a York house clearance firm has been left with a £1,200 hole in his pocket, after admitting that he failed to stop waste being dumped illegally.
  The house clearance store was at the far end of the corridor: a narrow shop front which opened into a warehouse piled high with old furniture.
  But they are hoping the house clearance sale will empty their home.
  He found the card during a house clearance following the death of his mother.
  At another, it looked like a house clearance had been done.
  Synonyms
  removal, clearing, clear-out, demolition
3. 1.3count noun (in soccer and other sports) a kick or hit that sends the ball away from one's goal.
  （英式足球等比赛）解围球
  Nilsson made two goal line clearances to keep out Tottenham's attackers
  Example sentencesExamples
  But they then displayed the defensive lapses that have lost them so dearly this last month as a penalty and two goals from failed clearances cost them the match.
  However, if luck had to be on their side they would have won by a least another five goals as the crossbar and goal line clearances saved the home side from a hammering.
  Then they returned the compliment by charging down a goal line clearance to reduce the deficit to 31-21.
  Around ten minutes into the second half, a testing series of corners was swung in underneath the cross bar requiring four goal line clearances in a frantic few minutes.
  He dances through again and is denied only by a last-ditch goal-line clearance.
  For the next five minutes it was all Stretford and it was down to some goal line clearances and the post to keep the score at 1-1.
  From a series of very well worked set plays St Mary's almost doubled their lead on four occasions only to be stopped by a series of goalline clearances.
  There has also been talk of him leaving the club, but the Frenchman's worth was exemplified after 15 minutes with an extraordinary goal line clearance.
  The striker's flick was instinctive and accurate enough to demand a goal-line clearance.
  He warns against carrying the ball across the face of the goal and urges all clearances that can't be made down-field to be directed to the sidelines.
  The only thing on the up for the hosts was their attempted clearance from defence.
  Their first real chance of the contest came after 22 minutes of play in the first half but they were stopped by a goal line clearance.
  A weak clearance fell to Rosser who blasted it low into the net.
  An early sliced clearance seemed to betray some attendant nerves.
  They kept battling and could have equalised, but great goalkeeping and a goal-line clearance saw them hold out.
  His run took him to the byline and his clearance only sent the ball running across the goalline.
  City's third skipper of the current campaign capped an aggressive display with a number of fine clearances and his first goal of the season.
  But, two goalline clearances and some sensational saves ensured York stayed in sight.
  The ball was slipped to a free player who should have made the most of the open goal but he made a supremely confident and composed clearance off the goal line.
  Soft, sloppy goals caused by panicky clearances and unfocused defending have blighted their play.
4. 1.4Snooker count noun The potting of all the balls remaining on the table in a single break.
  〔斯诺克〕一杆清盘，一杆全中
  a plant which let in Hendry for a clearance of 96
  Example sentencesExamples
  A 117 clearance then put him a frame away from victory.
  But when he completed a clearance of 142, worth £3,000 as the highest break of the tournament, it looked as if he would coast to victory.
  He then swept 4-2 ahead aided along the way by a 32 clearance and a break of 48.
  He fought back from 8-5 down to draw level, including a superb 136 clearance in the 15th frame.
  But he is unable to keep the break going, and Williams comes back, producing a clearance of 56 to take the early advantage.
2Official authorization for something to proceed or take place.
许可（证），批准
the aircraft hadn't got diplomatic clearance to land in Mexico
Example sentencesExamples
- If the project gets clearance from the authorities concerned, the matches could be held during December and January depending upon availability of players, the sources said.
- However, this had been hindered through highly bureaucratic and costly processes of sample clearance.
- Our patents clearance process makes sure we are not infringing the patents of anybody else.
- You may first enter the building before entering the unit and your service provider may need special clearance to enter the building or complex.
- At the time the deal was struck, it had yet to receive regulatory clearance from British competition authorities.
- The clearance process has taken somewhat longer than it took to do the studies in the first place at this point.
- The company obtained regulatory clearance for the merger from the US Federal Communications Commission last week.
- Obtain clearance from your doctor if you've been inactive for six months or more; otherwise you can step right into this eight-week program.
- Diving here requires clearance from the Ministry of Defence.
- They were awaiting clearance from head office and also from a contractor.
- Don't abandon your shelters until you're given clearance by the local authorities.
- Before doing any bike specific force work or high intensity intervals get clearance from your doctor.
- If you believe your husband is sincere in his permission, then you have a kind of moral clearance to proceed, if you choose to.
- The company is still going through the process of receiving environmental clearance from the Environmental Management Authority.
- Once the controlling officer gives the clearance, the candidate can commence the test at the computer.
- Other hurdles have to be got though, however, including clearance from the Mergers and Monopolies Commission, which is expected to deal with the issue fairly quickly.
- Once clearance has been authorized, it is imperative to receive proper instruction from a certified exercise professional.
- However, before going on any specific diet, please obtain clearance from your doctor.
- Post-menopausal women were required to obtain medical clearance from their physicians to participate in the study.
- A spokesperson for the Department of Agriculture said it only received clearance for grant aid in July and is processing 72 applications for the grant aid.
Synonyms
authorization, permission, consent, approval, seal of approval, blessing, acceptance, leave, sanction, licence, dispensation, assent, agreement, concurrence, endorsement, imprimatur
1. 2.1 Official permission for someone to have access to classified information.
  接触机密的官方许可
  these people don't have clearance
  这些人没有接触机密的官方许可。
  Example sentencesExamples
  He agreed to surrender his security clearance and cooperate in the government's continuing investigation, the Justice Department said.
  And revealing it to someone without proper security clearance or without a need to know is not authorized and is a violation.
  But the documents describing his security clearance could not lie.
  Given the nature of the question, it is difficult for those of us outside the intelligence community or without high level clearance to evaluate.
  The watchdog said too many people in Canada have the ability to issue passports, and some of those officials do not have adequate security clearance.
  Does her high security clearance prevent her from getting fired for not giving a whit about national security risks for which she's the responsible agent?
  In other words, they've had access to all the secret documents and they were not asked for security clearance until now, which is on the eve of the trial.
  The lack of security checks on employees extends right to the highest levels of clearance, the report said.
  I did not want any cloud of suspicion hanging over me, plus I had a high level clearance with the Department of Defense, and I needed my day in court.
  We're going to be here for several hours and then we are going to have to provide security clearance that is acceptable to the FBI, whether we go back to the UK or on to Washington.
  Who would have ever thought he'd even get his security clearance back?
  I'm afraid she doesn't have high enough security clearance for that.
  She wondered if she could even be trusted with a top-secret security clearance.
  There are some say that he should at least lose his security clearance.
  I managed to get some information with my security clearance before I went on the run.
  For the other, it urged an official reprimand and review of his security clearance.
  Students will get a passport and security clearance on the course, which will also offer them flights in the UK and to European destinations, along with a tour of a European airport.
  He had the highest security clearance, which gave him access to extremely sensitive data.
  Only people with classified security clearance were allowed to go inside the room.
  An intelligence analyst temporarily lost his top-secret security clearance because he faxed his resume using a commercial machine.
  Synonyms
  authorization, permission, consent, approval, seal of approval, blessing, acceptance, leave, sanction, licence, dispensation, assent, agreement, concurrence, endorsement, imprimatur
2. 2.2 Permission for an aircraft to take off or land at an airport.
  （飞机的）起飞（或降落）许可
  he took off without air traffic clearance
  他未取得空中交通许可就起飞了。
  Example sentencesExamples
  There was no further communication between the aircraft and ATC after the crew acknowledged receiving clearance for the approach.
  He was asking for permission to land and having gotten the necessary clearance he brought the ship in to one of the huge bays.
  He had to get the Air Traffic Control clearance and he had to communicate it.
  She climbed up the ladder of the small craft and awaited clearance for takeoff.
  The aircraft received clearance for take-off to Los Angeles at 7.45 am on Tuesday.
  If the airport is open and the tower gives the aircraft and the pilot clearance to land, then the pilot makes the decision whether or not he thinks it's safe.
  There is no requirement for us to be close to the runway to receive a takeoff clearance.
  The doomed plane was the last to be given clearance to take off before the airport was closed due to fog.
  I need clearance to land a Learjet 35A at any available airport.
  Once the check is completed and everything is found to be acceptable, the crew will be given a clearance to the destination airport.
  Even so, there's no guarantee of receiving a takeoff clearance.
  Obtaining clearance from the local air traffic control, she eased off the tarmac into the air.
  As I attempted to respond to the clearance confirmation, we had complete electrical failure!
  Synonyms
  permission, consent, authorization, sanction, warrant, dispensation, concession, indulgence, approval, blessing, agreement, backing, assent, acceptance, confirmation, ratification, mandate, licence, acquiescence, concurrence, liberty, freedom
3. 2.3 The clearing of a person or ship by customs.
  （人、船只的）结关
  when you arrive at the continental airport you will be required to obtain customs clearance
  Example sentencesExamples
  She was granted entry clearance on 11 th December, 1994.
  Neither had obtained prior entry clearance to the United Kingdom as required.
  A widower, he wanted my help in getting entry clearance for his second wife, from Pakistan.
  How did these wretched vehicles get customs clearance to enter the Philippines?
  The container has since arrived in Valparaiso where they are awaiting customs clearance.
4. 2.4count noun A certificate showing that customs clearance has been granted.
  出（或入）港证
  Example sentencesExamples
  Obviously, these clearances were granted in order to gain propaganda mileage for the elections.
5. 2.5 The process of clearing cheques through a clearing house.
  （支票的）兑现
  Example sentencesExamples
  For more than 11 days the six banks were excluded from the daily inter-bank clearance of cheques.
  The divergence in the transactions covered under the umbrella of money transfer orders contrasts with the system built around cheques and their clearance through banking channels.
  There are 8,000 banks across Europe, so it will be a number of years before the clearance systems can be fully integrated.
  Finally the banks are going to be forced to come clean and speed up cheque clearance.
  While I was waiting for the last item to go through cheque clearance I put a paperback book up, just to try the market.
  Without waiting for clearance of the cheques it issued the occupation certificate after which the trust stopped payment of the cheques.
  Synonyms
  payment, discharge, defrayal, liquidation, settling, settling up, clearing, satisfaction
3Clear space allowed for a thing to move past or under another.
移动空间
always give cyclists plenty of clearance
勿忘常给骑自行车者留出足够的移动空间。
Example sentencesExamples
- One is to gain clearance above trees, houses and other obstacles that create turbulence and reduce the power of the wind reaching the wind plant.
- The tunnel has been dogged by controversy over its clearance height, which is lower than the NRA's standard motorway bridge of 5.3 metres.
- Aren't there laws concerning boundary wall height, roof clearance, building from boundary distance?
- In all the designs we examined this time, the maximum clearance for riverborne traffic under the bridge would be around 4.5 metres.
- Unique in this segment are 15-inch wheels as standard, for improved ground clearance.
- Times have changed and we've also got traffic flow to consider so there had to be enough clearance underneath for cars to pass safely.
- He watches for prop clearance and ensures the aircraft doesn't tilt while fuel is pumped into special bladders.
- The wire rings add just enough space to create enough clearance between the boards, while still allowing us to put 16 boards in the lunchbox.
- They should be perfectly lined up to allow the sash to have just enough clearance for free movement, but not too much.
- The machines can be grouped side by side with zero clearance between machines to make the best use of limited floorspace.
- Rear seat passengers have a decent amount of room for a car of this class, with lots of head clearance and no need to be squashed against the backs of the front seats.
- For street trees the minimum clearance is often specified by municipal ordinance.
- And give your trees the same wide clearance - stay well beyond the driplines.
- The crew chief for the parked aircraft was also observing the wingtip clearance and continued to signal to the marshaller that all was clear, giving a thumbs-up.
- The smooth curvature allows plenty of cornering clearance.
- Ground clearance is 205 mm and special features include a newly designed rear tailgate, a dash-mounted handbrake and a CD player as standard.
- Those 14 record entries are the most in history by a woman and included the first ever clearance of 6 feet.
- Depending on the irregularity of the terrain, the operator can adjust both the ground clearance of the machine and height of each step.
- We quickly stopped the aircraft, with clearance from an approaching obstacle but not much mental comfort.
- They're raised with enough clearance so the penguins can waddle under them on the way to their burrows.
Synonyms
space, gap, room, room to spare, headroom, margin, leeway, allowance, separation, clearing

Rhymes

adherence, appearance, coherence, interference, perseverance

Definition of clearance in US English:

clearance

nounˈklirənsˈklɪrəns

1The action or process of removing or getting rid of something or of something's dispersing.
清除
cleaning of the machine should include clearance of blockages
清洁机器应包括阻塞物的清除。
there will be sunny intervals after clearance of any early mist
早晨的薄雾散后，会时不时出太阳。
Example sentencesExamples
- The school gives training in both ship diving and clearance diving.
- The clearance interval is signalled to pedestrians by a flashing red signal, which is displayed using the same lantern and the same standing person symbol as the steady red prohibition signal.
- This clearance was mediated by both active and passive transport processes.
- She and I headed straight for the clearance rack, talking as we went.
- When all pedestrians are agile and complete their crossing early in the clearance interval, vehicles can continue through the crossing without waiting for the green signal.
- Future work will include repairs to rural roads and road bridges and clearance of debris from waterways.
- If mucociliary clearance is impaired, colonization is followed by rapid replication and clinical infection.
- The other available demining strategies include clearance, destruction of stockpiles and the universalisation of the concept of the convention.
- And on a more everyday level, clearance rates - the percentage of crimes resolved by police - are up across the board.
- This ability of the kidneys to get rid of excess water from the body is called ‘free water clearance.’
- The navy clearance diving team will be home in late May.
- I patronize the clearance racks and the department store sales.
- Other alternative airway clearance techniques may involve handheld devices to assist with mobilizing the secretions.
- This includes bridge building, mine clearance, water supply, bulk fuels, route maintenance and field defences.
- Take a brisk stroll through the mall and catch the holiday clearance sale.
- Factors that may limit the usefulness of tanks in clearance operations include the following.
- However this clearance has not reduced the level of threat to civilian populations and relief agencies as it was aimed at facilitating the military advance.
Synonyms
destruction, knocking down, pulling down, tearing down, flattening, razing, levelling, bulldozing
1. 1.1often with modifier The removal of buildings, people, or trees from land so as to free it for alternative uses.
  拆迁，清空
  slum clearance accelerated during the 1960s
  20世纪60年代贫民窟拆迁加速了。
  forest clearances
  清林。
  Example sentencesExamples
  ‘We need government assistance to overcome forest theft and farm clearance as we can't do it alone,’ he urged.
  However, even in Amazonia, clearance is not a one-way process; for every 3 ha cleared, perhaps one is reclaimed by forest regeneration.
  Work started in spring of last year, with demolition, clearance and work to the new road lay-out.
  This encompasses securing the site perimeter, demolition and site clearance, flood defences, sheet piling, public riverside promenade and plaza.
  The rebuilding costs automatically include an allowance for full central heating costs, demolition and site clearance as well as architect and surveyor fees.
  The main threats now are the continuing effects of Dutch elm disease, clearance of mature trees and pollution from the spray drift of agrochemicals.
  But juniper trees were cut down during land clearances and for fuel.
  In this extensive process of clearance 40 graves were encountered and all of them opened.
  It will become a criminal offence to carry out damaging works such as road building, tree clearance or pond drainage without the consent of English Nature.
  In Greece, forest clearance and population increases led to severe soil erosion in the period 4000 to 3000 BC.
  From the 5th to the 12th centuries, agricultural land was created by forest clearance, or was reclaimed from marshland and the sea.
  They say the programme of tree felling and undergrowth clearance is being carried out at the wrong time of year, disturbing kingfishers, otters and bats.
  The latest figures show the rate of forest clearance in the Amazon last year was the second highest on record.
  The extensive sale of royal forests and land clearance for agriculture also had their effect on the oaks.
  Traditional preferences together with modern equipment have resulted in the accelerated clearance of old growth forests.
  Options include total demolition with redevelopment, total renovation or partial clearance and renovation.
  Two hundred years ago the roe deer was extinct in England and Wales, the victim of over-hunting and forest clearance.
  She aids him in everything from land clearance to castle building.
  Work on the site, including demolition and clearance, will begin towards the end of this month.
  The argument that the phrase referred only to building operations of a constructional nature and not to operations consisting in demolitions or site clearance was rejected.
  Synonyms
  removal, clearing, clear-out, demolition
2. 1.2 (in soccer and other games) a kick or hit that sends the ball out of a defensive zone.
  （英式足球等比赛）解围球
  Example sentencesExamples
  Soft, sloppy goals caused by panicky clearances and unfocused defending have blighted their play.
  Around ten minutes into the second half, a testing series of corners was swung in underneath the cross bar requiring four goal line clearances in a frantic few minutes.
  However, if luck had to be on their side they would have won by a least another five goals as the crossbar and goal line clearances saved the home side from a hammering.
  There has also been talk of him leaving the club, but the Frenchman's worth was exemplified after 15 minutes with an extraordinary goal line clearance.
  The only thing on the up for the hosts was their attempted clearance from defence.
  The striker's flick was instinctive and accurate enough to demand a goal-line clearance.
  His run took him to the byline and his clearance only sent the ball running across the goalline.
  A weak clearance fell to Rosser who blasted it low into the net.
  He warns against carrying the ball across the face of the goal and urges all clearances that can't be made down-field to be directed to the sidelines.
  City's third skipper of the current campaign capped an aggressive display with a number of fine clearances and his first goal of the season.
  Then they returned the compliment by charging down a goal line clearance to reduce the deficit to 31-21.
  But they then displayed the defensive lapses that have lost them so dearly this last month as a penalty and two goals from failed clearances cost them the match.
  He dances through again and is denied only by a last-ditch goal-line clearance.
  The ball was slipped to a free player who should have made the most of the open goal but he made a supremely confident and composed clearance off the goal line.
  For the next five minutes it was all Stretford and it was down to some goal line clearances and the post to keep the score at 1-1.
  Their first real chance of the contest came after 22 minutes of play in the first half but they were stopped by a goal line clearance.
  But, two goalline clearances and some sensational saves ensured York stayed in sight.
  They kept battling and could have equalised, but great goalkeeping and a goal-line clearance saw them hold out.
  From a series of very well worked set plays St Mary's almost doubled their lead on four occasions only to be stopped by a series of goalline clearances.
  An early sliced clearance seemed to betray some attendant nerves.
2Official authorization for something to proceed or take place.
许可（证），批准
getting diplomatic clearance to fly into or over a country is not always easy
Example sentencesExamples
- The clearance process has taken somewhat longer than it took to do the studies in the first place at this point.
- Once clearance has been authorized, it is imperative to receive proper instruction from a certified exercise professional.
- If the project gets clearance from the authorities concerned, the matches could be held during December and January depending upon availability of players, the sources said.
- Our patents clearance process makes sure we are not infringing the patents of anybody else.
- However, this had been hindered through highly bureaucratic and costly processes of sample clearance.
- Before doing any bike specific force work or high intensity intervals get clearance from your doctor.
- The company is still going through the process of receiving environmental clearance from the Environmental Management Authority.
- Obtain clearance from your doctor if you've been inactive for six months or more; otherwise you can step right into this eight-week program.
- The company obtained regulatory clearance for the merger from the US Federal Communications Commission last week.
- Don't abandon your shelters until you're given clearance by the local authorities.
- At the time the deal was struck, it had yet to receive regulatory clearance from British competition authorities.
- If you believe your husband is sincere in his permission, then you have a kind of moral clearance to proceed, if you choose to.
- Post-menopausal women were required to obtain medical clearance from their physicians to participate in the study.
- Other hurdles have to be got though, however, including clearance from the Mergers and Monopolies Commission, which is expected to deal with the issue fairly quickly.
- You may first enter the building before entering the unit and your service provider may need special clearance to enter the building or complex.
- They were awaiting clearance from head office and also from a contractor.
- However, before going on any specific diet, please obtain clearance from your doctor.
- Diving here requires clearance from the Ministry of Defence.
- A spokesperson for the Department of Agriculture said it only received clearance for grant aid in July and is processing 72 applications for the grant aid.
- Once the controlling officer gives the clearance, the candidate can commence the test at the computer.
Synonyms
authorization, permission, consent, approval, seal of approval, blessing, acceptance, leave, sanction, licence, dispensation, assent, agreement, concurrence, endorsement, imprimatur
1. 2.1 Official permission for someone to have access to classified information.
  接触机密的官方许可
  these people don't have clearance
  这些人没有接触机密的官方许可。
  Example sentencesExamples
  He agreed to surrender his security clearance and cooperate in the government's continuing investigation, the Justice Department said.
  Does her high security clearance prevent her from getting fired for not giving a whit about national security risks for which she's the responsible agent?
  Given the nature of the question, it is difficult for those of us outside the intelligence community or without high level clearance to evaluate.
  There are some say that he should at least lose his security clearance.
  The lack of security checks on employees extends right to the highest levels of clearance, the report said.
  I managed to get some information with my security clearance before I went on the run.
  I did not want any cloud of suspicion hanging over me, plus I had a high level clearance with the Department of Defense, and I needed my day in court.
  But the documents describing his security clearance could not lie.
  For the other, it urged an official reprimand and review of his security clearance.
  Only people with classified security clearance were allowed to go inside the room.
  I'm afraid she doesn't have high enough security clearance for that.
  In other words, they've had access to all the secret documents and they were not asked for security clearance until now, which is on the eve of the trial.
  We're going to be here for several hours and then we are going to have to provide security clearance that is acceptable to the FBI, whether we go back to the UK or on to Washington.
  The watchdog said too many people in Canada have the ability to issue passports, and some of those officials do not have adequate security clearance.
  Students will get a passport and security clearance on the course, which will also offer them flights in the UK and to European destinations, along with a tour of a European airport.
  Who would have ever thought he'd even get his security clearance back?
  She wondered if she could even be trusted with a top-secret security clearance.
  An intelligence analyst temporarily lost his top-secret security clearance because he faxed his resume using a commercial machine.
  He had the highest security clearance, which gave him access to extremely sensitive data.
  And revealing it to someone without proper security clearance or without a need to know is not authorized and is a violation.
  Synonyms
  authorization, permission, consent, approval, seal of approval, blessing, acceptance, leave, sanction, licence, dispensation, assent, agreement, concurrence, endorsement, imprimatur
2. 2.2 Permission for an aircraft to take off or land at an airport.
  （飞机的）起飞（或降落）许可
  he took off without air traffic clearance
  他未取得空中交通许可就起飞了。
  Example sentencesExamples
  Once the check is completed and everything is found to be acceptable, the crew will be given a clearance to the destination airport.
  There was no further communication between the aircraft and ATC after the crew acknowledged receiving clearance for the approach.
  Even so, there's no guarantee of receiving a takeoff clearance.
  There is no requirement for us to be close to the runway to receive a takeoff clearance.
  If the airport is open and the tower gives the aircraft and the pilot clearance to land, then the pilot makes the decision whether or not he thinks it's safe.
  The aircraft received clearance for take-off to Los Angeles at 7.45 am on Tuesday.
  He had to get the Air Traffic Control clearance and he had to communicate it.
  As I attempted to respond to the clearance confirmation, we had complete electrical failure!
  He was asking for permission to land and having gotten the necessary clearance he brought the ship in to one of the huge bays.
  She climbed up the ladder of the small craft and awaited clearance for takeoff.
  The doomed plane was the last to be given clearance to take off before the airport was closed due to fog.
  I need clearance to land a Learjet 35A at any available airport.
  Obtaining clearance from the local air traffic control, she eased off the tarmac into the air.
  Synonyms
  permission, consent, authorization, sanction, warrant, dispensation, concession, indulgence, approval, blessing, agreement, backing, assent, acceptance, confirmation, ratification, mandate, licence, acquiescence, concurrence, liberty, freedom
3. 2.3 The clearing of a person or ship by customs.
  （人、船只的）结关
  Example sentencesExamples
  A widower, he wanted my help in getting entry clearance for his second wife, from Pakistan.
  The container has since arrived in Valparaiso where they are awaiting customs clearance.
  She was granted entry clearance on 11 th December, 1994.
  Neither had obtained prior entry clearance to the United Kingdom as required.
  How did these wretched vehicles get customs clearance to enter the Philippines?
4. 2.4 A certificate showing that clearance of a person or ship has been granted.
  出（或入）港证
  Example sentencesExamples
  Obviously, these clearances were granted in order to gain propaganda mileage for the elections.
5. 2.5 The process of clearing checks through a clearinghouse.
  （支票的）兑现
  Example sentencesExamples
  While I was waiting for the last item to go through cheque clearance I put a paperback book up, just to try the market.
  There are 8,000 banks across Europe, so it will be a number of years before the clearance systems can be fully integrated.
  The divergence in the transactions covered under the umbrella of money transfer orders contrasts with the system built around cheques and their clearance through banking channels.
  Finally the banks are going to be forced to come clean and speed up cheque clearance.
  For more than 11 days the six banks were excluded from the daily inter-bank clearance of cheques.
  Without waiting for clearance of the cheques it issued the occupation certificate after which the trust stopped payment of the cheques.
  Synonyms
  payment, discharge, defrayal, liquidation, settling, settling up, clearing, satisfaction
3Clear space allowed for a thing to move past or under another.
移动空间
always give cyclists plenty of clearance
勿忘常给骑自行车者留出足够的移动空间。
Example sentencesExamples
- He watches for prop clearance and ensures the aircraft doesn't tilt while fuel is pumped into special bladders.
- Those 14 record entries are the most in history by a woman and included the first ever clearance of 6 feet.
- The tunnel has been dogged by controversy over its clearance height, which is lower than the NRA's standard motorway bridge of 5.3 metres.
- Ground clearance is 205 mm and special features include a newly designed rear tailgate, a dash-mounted handbrake and a CD player as standard.
- Rear seat passengers have a decent amount of room for a car of this class, with lots of head clearance and no need to be squashed against the backs of the front seats.
- Depending on the irregularity of the terrain, the operator can adjust both the ground clearance of the machine and height of each step.
- One is to gain clearance above trees, houses and other obstacles that create turbulence and reduce the power of the wind reaching the wind plant.
- They're raised with enough clearance so the penguins can waddle under them on the way to their burrows.
- We quickly stopped the aircraft, with clearance from an approaching obstacle but not much mental comfort.
- Unique in this segment are 15-inch wheels as standard, for improved ground clearance.
- In all the designs we examined this time, the maximum clearance for riverborne traffic under the bridge would be around 4.5 metres.
- For street trees the minimum clearance is often specified by municipal ordinance.
- They should be perfectly lined up to allow the sash to have just enough clearance for free movement, but not too much.
- Times have changed and we've also got traffic flow to consider so there had to be enough clearance underneath for cars to pass safely.
- The smooth curvature allows plenty of cornering clearance.
- The machines can be grouped side by side with zero clearance between machines to make the best use of limited floorspace.
- The wire rings add just enough space to create enough clearance between the boards, while still allowing us to put 16 boards in the lunchbox.
- Aren't there laws concerning boundary wall height, roof clearance, building from boundary distance?
- And give your trees the same wide clearance - stay well beyond the driplines.
- The crew chief for the parked aircraft was also observing the wingtip clearance and continued to signal to the marshaller that all was clear, giving a thumbs-up.
Synonyms
space, gap, room, room to spare, headroom, margin, leeway, allowance, separation, clearing

词汇	clearance
释义	Definition of clearance in English: clearance noun ˈklɪər(ə)nsˈklɪrəns mass noun 1The action or process of clearing or of being dispersed. 清除 cleaning of the machine should include clearance of blockages 清洁机器应包括阻塞物的清除。 there will be sunny intervals after clearance of any early mist 早晨的薄雾散后，会时不时出太阳。 Example sentencesExamples This clearance was mediated by both active and passive transport processes. The school gives training in both ship diving and clearance diving. Take a brisk stroll through the mall and catch the holiday clearance sale. This includes bridge building, mine clearance, water supply, bulk fuels, route maintenance and field defences. The navy clearance diving team will be home in late May. She and I headed straight for the clearance rack, talking as we went. Future work will include repairs to rural roads and road bridges and clearance of debris from waterways. When all pedestrians are agile and complete their crossing early in the clearance interval, vehicles can continue through the crossing without waiting for the green signal. This ability of the kidneys to get rid of excess water from the body is called ‘free water clearance.’ However this clearance has not reduced the level of threat to civilian populations and relief agencies as it was aimed at facilitating the military advance. And on a more everyday level, clearance rates - the percentage of crimes resolved by police - are up across the board. If mucociliary clearance is impaired, colonization is followed by rapid replication and clinical infection. Other alternative airway clearance techniques may involve handheld devices to assist with mobilizing the secretions. Factors that may limit the usefulness of tanks in clearance operations include the following. The clearance interval is signalled to pedestrians by a flashing red signal, which is displayed using the same lantern and the same standing person symbol as the steady red prohibition signal. The other available demining strategies include clearance, destruction of stockpiles and the universalisation of the concept of the convention. I patronize the clearance racks and the department store sales. Synonyms destruction, knocking down, pulling down, tearing down, flattening, razing, levelling, bulldozing 1.1 The removal of buildings, people, or trees from land so as to free it for alternative uses. 拆迁，清空 slum clearance accelerated during the 1960s 20世纪60年代贫民窟拆迁加速了。 count noun forest clearances 清林。 Example sentencesExamples ‘We need government assistance to overcome forest theft and farm clearance as we can't do it alone,’ he urged. She aids him in everything from land clearance to castle building. Work started in spring of last year, with demolition, clearance and work to the new road lay-out. This encompasses securing the site perimeter, demolition and site clearance, flood defences, sheet piling, public riverside promenade and plaza. Two hundred years ago the roe deer was extinct in England and Wales, the victim of over-hunting and forest clearance. Work on the site, including demolition and clearance, will begin towards the end of this month. In this extensive process of clearance 40 graves were encountered and all of them opened. The latest figures show the rate of forest clearance in the Amazon last year was the second highest on record. The main threats now are the continuing effects of Dutch elm disease, clearance of mature trees and pollution from the spray drift of agrochemicals. Options include total demolition with redevelopment, total renovation or partial clearance and renovation. The extensive sale of royal forests and land clearance for agriculture also had their effect on the oaks. The rebuilding costs automatically include an allowance for full central heating costs, demolition and site clearance as well as architect and surveyor fees. It will become a criminal offence to carry out damaging works such as road building, tree clearance or pond drainage without the consent of English Nature. The argument that the phrase referred only to building operations of a constructional nature and not to operations consisting in demolitions or site clearance was rejected. From the 5th to the 12th centuries, agricultural land was created by forest clearance, or was reclaimed from marshland and the sea. Traditional preferences together with modern equipment have resulted in the accelerated clearance of old growth forests. In Greece, forest clearance and population increases led to severe soil erosion in the period 4000 to 3000 BC. However, even in Amazonia, clearance is not a one-way process; for every 3 ha cleared, perhaps one is reclaimed by forest regeneration. But juniper trees were cut down during land clearances and for fuel. They say the programme of tree felling and undergrowth clearance is being carried out at the wrong time of year, disturbing kingfishers, otters and bats. Synonyms removal, clearing, clear-out, demolition 1.2 The removal of contents from a house. （房屋的）清空 the sheriff's officers supervised the house clearance 司法官员们监督房子的清空。 count noun antiques wanted and clearances undertaken 古董须保留，房屋须清空。 Example sentencesExamples The item has been in the family of the unnamed Boltonian since an ancestor picked it up as part of a house clearance at the home of the deceased Forth Earl of Egremont in the 19th Century. The staff give up their time free of charge and the charity raises money to run the workshop selling the ornaments left over from house clearances. But it was slightly puzzling that the album, believed to have been sold on through car boot sales and discarded during a house clearance, had been found in Liverpool, he added. The house clearance, which will be filmed for the television show, will be held between 1.30 pm and 5pm. That was because the fishmonger did house clearances on a Monday and never had time to unload the odds and ends floating about in the back of the van. As a last resort we can call in a house clearance agent but, frankly, I'd rather give it away than do that. He also runs a second hand shop and a house clearance business, and his next task is to raise £600,000 for a new running track. It also has two vans which provide a furniture service and a shop which sells smaller items from house clearances to raise funds. There must be one at one of those house clearance places, and it suddenly occurred to me that it was a slightly better storage solution than stacking my stuff behind a chair. It bore no reference to where the dead men were from, but after some initial digging, he discovered it had come from a house clearance in Rawmarsh. He said the case had been found during a house clearance by another auctioneer, who passed it on to them to sell for a client. If anyone is selling one, or giving one away in a house clearance, could they either contact me or leave an advertisement in the front page classified column of the Times. The auctioneers turned what was essentially a house clearance into a must-go event. You would think it rather hard to acquire old cigarette packets, but they turn up, quite surprisingly, in house clearances, when attics are sorted out, or when old shops are closed down and the cellars are emptied. During a house clearance, a 1948 programme for a concert at Sheffield City Hall, signed by Prime Minister of the day, Anthony Eden, was found. The boss of a York house clearance firm has been left with a £1,200 hole in his pocket, after admitting that he failed to stop waste being dumped illegally. The house clearance store was at the far end of the corridor: a narrow shop front which opened into a warehouse piled high with old furniture. But they are hoping the house clearance sale will empty their home. He found the card during a house clearance following the death of his mother. At another, it looked like a house clearance had been done. Synonyms removal, clearing, clear-out, demolition 1.3count noun (in soccer and other sports) a kick or hit that sends the ball away from one's goal. （英式足球等比赛）解围球 Nilsson made two goal line clearances to keep out Tottenham's attackers Example sentencesExamples But they then displayed the defensive lapses that have lost them so dearly this last month as a penalty and two goals from failed clearances cost them the match. However, if luck had to be on their side they would have won by a least another five goals as the crossbar and goal line clearances saved the home side from a hammering. Then they returned the compliment by charging down a goal line clearance to reduce the deficit to 31-21. Around ten minutes into the second half, a testing series of corners was swung in underneath the cross bar requiring four goal line clearances in a frantic few minutes. He dances through again and is denied only by a last-ditch goal-line clearance. For the next five minutes it was all Stretford and it was down to some goal line clearances and the post to keep the score at 1-1. From a series of very well worked set plays St Mary's almost doubled their lead on four occasions only to be stopped by a series of goalline clearances. There has also been talk of him leaving the club, but the Frenchman's worth was exemplified after 15 minutes with an extraordinary goal line clearance. The striker's flick was instinctive and accurate enough to demand a goal-line clearance. He warns against carrying the ball across the face of the goal and urges all clearances that can't be made down-field to be directed to the sidelines. The only thing on the up for the hosts was their attempted clearance from defence. Their first real chance of the contest came after 22 minutes of play in the first half but they were stopped by a goal line clearance. A weak clearance fell to Rosser who blasted it low into the net. An early sliced clearance seemed to betray some attendant nerves. They kept battling and could have equalised, but great goalkeeping and a goal-line clearance saw them hold out. His run took him to the byline and his clearance only sent the ball running across the goalline. City's third skipper of the current campaign capped an aggressive display with a number of fine clearances and his first goal of the season. But, two goalline clearances and some sensational saves ensured York stayed in sight. The ball was slipped to a free player who should have made the most of the open goal but he made a supremely confident and composed clearance off the goal line. Soft, sloppy goals caused by panicky clearances and unfocused defending have blighted their play. 1.4Snooker count noun The potting of all the balls remaining on the table in a single break. 〔斯诺克〕一杆清盘，一杆全中 a plant which let in Hendry for a clearance of 96 Example sentencesExamples A 117 clearance then put him a frame away from victory. But when he completed a clearance of 142, worth £3,000 as the highest break of the tournament, it looked as if he would coast to victory. He then swept 4-2 ahead aided along the way by a 32 clearance and a break of 48. He fought back from 8-5 down to draw level, including a superb 136 clearance in the 15th frame. But he is unable to keep the break going, and Williams comes back, producing a clearance of 56 to take the early advantage. 2Official authorization for something to proceed or take place. 许可（证），批准 the aircraft hadn't got diplomatic clearance to land in Mexico Example sentencesExamples If the project gets clearance from the authorities concerned, the matches could be held during December and January depending upon availability of players, the sources said. However, this had been hindered through highly bureaucratic and costly processes of sample clearance. Our patents clearance process makes sure we are not infringing the patents of anybody else. You may first enter the building before entering the unit and your service provider may need special clearance to enter the building or complex. At the time the deal was struck, it had yet to receive regulatory clearance from British competition authorities. The clearance process has taken somewhat longer than it took to do the studies in the first place at this point. The company obtained regulatory clearance for the merger from the US Federal Communications Commission last week. Obtain clearance from your doctor if you've been inactive for six months or more; otherwise you can step right into this eight-week program. Diving here requires clearance from the Ministry of Defence. They were awaiting clearance from head office and also from a contractor. Don't abandon your shelters until you're given clearance by the local authorities. Before doing any bike specific force work or high intensity intervals get clearance from your doctor. If you believe your husband is sincere in his permission, then you have a kind of moral clearance to proceed, if you choose to. The company is still going through the process of receiving environmental clearance from the Environmental Management Authority. Once the controlling officer gives the clearance, the candidate can commence the test at the computer. Other hurdles have to be got though, however, including clearance from the Mergers and Monopolies Commission, which is expected to deal with the issue fairly quickly. Once clearance has been authorized, it is imperative to receive proper instruction from a certified exercise professional. However, before going on any specific diet, please obtain clearance from your doctor. Post-menopausal women were required to obtain medical clearance from their physicians to participate in the study. A spokesperson for the Department of Agriculture said it only received clearance for grant aid in July and is processing 72 applications for the grant aid. Synonyms authorization, permission, consent, approval, seal of approval, blessing, acceptance, leave, sanction, licence, dispensation, assent, agreement, concurrence, endorsement, imprimatur 2.1 Official permission for someone to have access to classified information. 接触机密的官方许可 these people don't have clearance 这些人没有接触机密的官方许可。 Example sentencesExamples He agreed to surrender his security clearance and cooperate in the government's continuing investigation, the Justice Department said. And revealing it to someone without proper security clearance or without a need to know is not authorized and is a violation. But the documents describing his security clearance could not lie. Given the nature of the question, it is difficult for those of us outside the intelligence community or without high level clearance to evaluate. The watchdog said too many people in Canada have the ability to issue passports, and some of those officials do not have adequate security clearance. Does her high security clearance prevent her from getting fired for not giving a whit about national security risks for which she's the responsible agent? In other words, they've had access to all the secret documents and they were not asked for security clearance until now, which is on the eve of the trial. The lack of security checks on employees extends right to the highest levels of clearance, the report said. I did not want any cloud of suspicion hanging over me, plus I had a high level clearance with the Department of Defense, and I needed my day in court. We're going to be here for several hours and then we are going to have to provide security clearance that is acceptable to the FBI, whether we go back to the UK or on to Washington. Who would have ever thought he'd even get his security clearance back? I'm afraid she doesn't have high enough security clearance for that. She wondered if she could even be trusted with a top-secret security clearance. There are some say that he should at least lose his security clearance. I managed to get some information with my security clearance before I went on the run. For the other, it urged an official reprimand and review of his security clearance. Students will get a passport and security clearance on the course, which will also offer them flights in the UK and to European destinations, along with a tour of a European airport. He had the highest security clearance, which gave him access to extremely sensitive data. Only people with classified security clearance were allowed to go inside the room. An intelligence analyst temporarily lost his top-secret security clearance because he faxed his resume using a commercial machine. Synonyms authorization, permission, consent, approval, seal of approval, blessing, acceptance, leave, sanction, licence, dispensation, assent, agreement, concurrence, endorsement, imprimatur 2.2 Permission for an aircraft to take off or land at an airport. （飞机的）起飞（或降落）许可 he took off without air traffic clearance 他未取得空中交通许可就起飞了。 Example sentencesExamples There was no further communication between the aircraft and ATC after the crew acknowledged receiving clearance for the approach. He was asking for permission to land and having gotten the necessary clearance he brought the ship in to one of the huge bays. He had to get the Air Traffic Control clearance and he had to communicate it. She climbed up the ladder of the small craft and awaited clearance for takeoff. The aircraft received clearance for take-off to Los Angeles at 7.45 am on Tuesday. If the airport is open and the tower gives the aircraft and the pilot clearance to land, then the pilot makes the decision whether or not he thinks it's safe. There is no requirement for us to be close to the runway to receive a takeoff clearance. The doomed plane was the last to be given clearance to take off before the airport was closed due to fog. I need clearance to land a Learjet 35A at any available airport. Once the check is completed and everything is found to be acceptable, the crew will be given a clearance to the destination airport. Even so, there's no guarantee of receiving a takeoff clearance. Obtaining clearance from the local air traffic control, she eased off the tarmac into the air. As I attempted to respond to the clearance confirmation, we had complete electrical failure! Synonyms permission, consent, authorization, sanction, warrant, dispensation, concession, indulgence, approval, blessing, agreement, backing, assent, acceptance, confirmation, ratification, mandate, licence, acquiescence, concurrence, liberty, freedom 2.3 The clearing of a person or ship by customs. （人、船只的）结关 when you arrive at the continental airport you will be required to obtain customs clearance Example sentencesExamples She was granted entry clearance on 11 th December, 1994. Neither had obtained prior entry clearance to the United Kingdom as required. A widower, he wanted my help in getting entry clearance for his second wife, from Pakistan. How did these wretched vehicles get customs clearance to enter the Philippines? The container has since arrived in Valparaiso where they are awaiting customs clearance. 2.4count noun A certificate showing that customs clearance has been granted. 出（或入）港证 Example sentencesExamples Obviously, these clearances were granted in order to gain propaganda mileage for the elections. 2.5 The process of clearing cheques through a clearing house. （支票的）兑现 Example sentencesExamples For more than 11 days the six banks were excluded from the daily inter-bank clearance of cheques. The divergence in the transactions covered under the umbrella of money transfer orders contrasts with the system built around cheques and their clearance through banking channels. There are 8,000 banks across Europe, so it will be a number of years before the clearance systems can be fully integrated. Finally the banks are going to be forced to come clean and speed up cheque clearance. While I was waiting for the last item to go through cheque clearance I put a paperback book up, just to try the market. Without waiting for clearance of the cheques it issued the occupation certificate after which the trust stopped payment of the cheques. Synonyms payment, discharge, defrayal, liquidation, settling, settling up, clearing, satisfaction 3Clear space allowed for a thing to move past or under another. 移动空间 always give cyclists plenty of clearance 勿忘常给骑自行车者留出足够的移动空间。 Example sentencesExamples One is to gain clearance above trees, houses and other obstacles that create turbulence and reduce the power of the wind reaching the wind plant. The tunnel has been dogged by controversy over its clearance height, which is lower than the NRA's standard motorway bridge of 5.3 metres. Aren't there laws concerning boundary wall height, roof clearance, building from boundary distance? In all the designs we examined this time, the maximum clearance for riverborne traffic under the bridge would be around 4.5 metres. Unique in this segment are 15-inch wheels as standard, for improved ground clearance. Times have changed and we've also got traffic flow to consider so there had to be enough clearance underneath for cars to pass safely. He watches for prop clearance and ensures the aircraft doesn't tilt while fuel is pumped into special bladders. The wire rings add just enough space to create enough clearance between the boards, while still allowing us to put 16 boards in the lunchbox. They should be perfectly lined up to allow the sash to have just enough clearance for free movement, but not too much. The machines can be grouped side by side with zero clearance between machines to make the best use of limited floorspace. Rear seat passengers have a decent amount of room for a car of this class, with lots of head clearance and no need to be squashed against the backs of the front seats. For street trees the minimum clearance is often specified by municipal ordinance. And give your trees the same wide clearance - stay well beyond the driplines. The crew chief for the parked aircraft was also observing the wingtip clearance and continued to signal to the marshaller that all was clear, giving a thumbs-up. The smooth curvature allows plenty of cornering clearance. Ground clearance is 205 mm and special features include a newly designed rear tailgate, a dash-mounted handbrake and a CD player as standard. Those 14 record entries are the most in history by a woman and included the first ever clearance of 6 feet. Depending on the irregularity of the terrain, the operator can adjust both the ground clearance of the machine and height of each step. We quickly stopped the aircraft, with clearance from an approaching obstacle but not much mental comfort. They're raised with enough clearance so the penguins can waddle under them on the way to their burrows. Synonyms space, gap, room, room to spare, headroom, margin, leeway, allowance, separation, clearing Rhymes adherence, appearance, coherence, interference, perseverance Definition of clearance in US English: clearance nounˈklirənsˈklɪrəns 1The action or process of removing or getting rid of something or of something's dispersing. 清除 cleaning of the machine should include clearance of blockages 清洁机器应包括阻塞物的清除。 there will be sunny intervals after clearance of any early mist 早晨的薄雾散后，会时不时出太阳。 Example sentencesExamples The school gives training in both ship diving and clearance diving. The clearance interval is signalled to pedestrians by a flashing red signal, which is displayed using the same lantern and the same standing person symbol as the steady red prohibition signal. This clearance was mediated by both active and passive transport processes. She and I headed straight for the clearance rack, talking as we went. When all pedestrians are agile and complete their crossing early in the clearance interval, vehicles can continue through the crossing without waiting for the green signal. Future work will include repairs to rural roads and road bridges and clearance of debris from waterways. If mucociliary clearance is impaired, colonization is followed by rapid replication and clinical infection. The other available demining strategies include clearance, destruction of stockpiles and the universalisation of the concept of the convention. And on a more everyday level, clearance rates - the percentage of crimes resolved by police - are up across the board. This ability of the kidneys to get rid of excess water from the body is called ‘free water clearance.’ The navy clearance diving team will be home in late May. I patronize the clearance racks and the department store sales. Other alternative airway clearance techniques may involve handheld devices to assist with mobilizing the secretions. This includes bridge building, mine clearance, water supply, bulk fuels, route maintenance and field defences. Take a brisk stroll through the mall and catch the holiday clearance sale. Factors that may limit the usefulness of tanks in clearance operations include the following. However this clearance has not reduced the level of threat to civilian populations and relief agencies as it was aimed at facilitating the military advance. Synonyms destruction, knocking down, pulling down, tearing down, flattening, razing, levelling, bulldozing 1.1often with modifier The removal of buildings, people, or trees from land so as to free it for alternative uses. 拆迁，清空 slum clearance accelerated during the 1960s 20世纪60年代贫民窟拆迁加速了。 forest clearances 清林。 Example sentencesExamples ‘We need government assistance to overcome forest theft and farm clearance as we can't do it alone,’ he urged. However, even in Amazonia, clearance is not a one-way process; for every 3 ha cleared, perhaps one is reclaimed by forest regeneration. Work started in spring of last year, with demolition, clearance and work to the new road lay-out. This encompasses securing the site perimeter, demolition and site clearance, flood defences, sheet piling, public riverside promenade and plaza. The rebuilding costs automatically include an allowance for full central heating costs, demolition and site clearance as well as architect and surveyor fees. The main threats now are the continuing effects of Dutch elm disease, clearance of mature trees and pollution from the spray drift of agrochemicals. But juniper trees were cut down during land clearances and for fuel. In this extensive process of clearance 40 graves were encountered and all of them opened. It will become a criminal offence to carry out damaging works such as road building, tree clearance or pond drainage without the consent of English Nature. In Greece, forest clearance and population increases led to severe soil erosion in the period 4000 to 3000 BC. From the 5th to the 12th centuries, agricultural land was created by forest clearance, or was reclaimed from marshland and the sea. They say the programme of tree felling and undergrowth clearance is being carried out at the wrong time of year, disturbing kingfishers, otters and bats. The latest figures show the rate of forest clearance in the Amazon last year was the second highest on record. The extensive sale of royal forests and land clearance for agriculture also had their effect on the oaks. Traditional preferences together with modern equipment have resulted in the accelerated clearance of old growth forests. Options include total demolition with redevelopment, total renovation or partial clearance and renovation. Two hundred years ago the roe deer was extinct in England and Wales, the victim of over-hunting and forest clearance. She aids him in everything from land clearance to castle building. Work on the site, including demolition and clearance, will begin towards the end of this month. The argument that the phrase referred only to building operations of a constructional nature and not to operations consisting in demolitions or site clearance was rejected. Synonyms removal, clearing, clear-out, demolition 1.2 (in soccer and other games) a kick or hit that sends the ball out of a defensive zone. （英式足球等比赛）解围球 Example sentencesExamples Soft, sloppy goals caused by panicky clearances and unfocused defending have blighted their play. Around ten minutes into the second half, a testing series of corners was swung in underneath the cross bar requiring four goal line clearances in a frantic few minutes. However, if luck had to be on their side they would have won by a least another five goals as the crossbar and goal line clearances saved the home side from a hammering. There has also been talk of him leaving the club, but the Frenchman's worth was exemplified after 15 minutes with an extraordinary goal line clearance. The only thing on the up for the hosts was their attempted clearance from defence. The striker's flick was instinctive and accurate enough to demand a goal-line clearance. His run took him to the byline and his clearance only sent the ball running across the goalline. A weak clearance fell to Rosser who blasted it low into the net. He warns against carrying the ball across the face of the goal and urges all clearances that can't be made down-field to be directed to the sidelines. City's third skipper of the current campaign capped an aggressive display with a number of fine clearances and his first goal of the season. Then they returned the compliment by charging down a goal line clearance to reduce the deficit to 31-21. But they then displayed the defensive lapses that have lost them so dearly this last month as a penalty and two goals from failed clearances cost them the match. He dances through again and is denied only by a last-ditch goal-line clearance. The ball was slipped to a free player who should have made the most of the open goal but he made a supremely confident and composed clearance off the goal line. For the next five minutes it was all Stretford and it was down to some goal line clearances and the post to keep the score at 1-1. Their first real chance of the contest came after 22 minutes of play in the first half but they were stopped by a goal line clearance. But, two goalline clearances and some sensational saves ensured York stayed in sight. They kept battling and could have equalised, but great goalkeeping and a goal-line clearance saw them hold out. From a series of very well worked set plays St Mary's almost doubled their lead on four occasions only to be stopped by a series of goalline clearances. An early sliced clearance seemed to betray some attendant nerves. 2Official authorization for something to proceed or take place. 许可（证），批准 getting diplomatic clearance to fly into or over a country is not always easy Example sentencesExamples The clearance process has taken somewhat longer than it took to do the studies in the first place at this point. Once clearance has been authorized, it is imperative to receive proper instruction from a certified exercise professional. If the project gets clearance from the authorities concerned, the matches could be held during December and January depending upon availability of players, the sources said. Our patents clearance process makes sure we are not infringing the patents of anybody else. However, this had been hindered through highly bureaucratic and costly processes of sample clearance. Before doing any bike specific force work or high intensity intervals get clearance from your doctor. The company is still going through the process of receiving environmental clearance from the Environmental Management Authority. Obtain clearance from your doctor if you've been inactive for six months or more; otherwise you can step right into this eight-week program. The company obtained regulatory clearance for the merger from the US Federal Communications Commission last week. Don't abandon your shelters until you're given clearance by the local authorities. At the time the deal was struck, it had yet to receive regulatory clearance from British competition authorities. If you believe your husband is sincere in his permission, then you have a kind of moral clearance to proceed, if you choose to. Post-menopausal women were required to obtain medical clearance from their physicians to participate in the study. Other hurdles have to be got though, however, including clearance from the Mergers and Monopolies Commission, which is expected to deal with the issue fairly quickly. You may first enter the building before entering the unit and your service provider may need special clearance to enter the building or complex. They were awaiting clearance from head office and also from a contractor. However, before going on any specific diet, please obtain clearance from your doctor. Diving here requires clearance from the Ministry of Defence. A spokesperson for the Department of Agriculture said it only received clearance for grant aid in July and is processing 72 applications for the grant aid. Once the controlling officer gives the clearance, the candidate can commence the test at the computer. Synonyms authorization, permission, consent, approval, seal of approval, blessing, acceptance, leave, sanction, licence, dispensation, assent, agreement, concurrence, endorsement, imprimatur 2.1 Official permission for someone to have access to classified information. 接触机密的官方许可 these people don't have clearance 这些人没有接触机密的官方许可。 Example sentencesExamples He agreed to surrender his security clearance and cooperate in the government's continuing investigation, the Justice Department said. Does her high security clearance prevent her from getting fired for not giving a whit about national security risks for which she's the responsible agent? Given the nature of the question, it is difficult for those of us outside the intelligence community or without high level clearance to evaluate. There are some say that he should at least lose his security clearance. The lack of security checks on employees extends right to the highest levels of clearance, the report said. I managed to get some information with my security clearance before I went on the run. I did not want any cloud of suspicion hanging over me, plus I had a high level clearance with the Department of Defense, and I needed my day in court. But the documents describing his security clearance could not lie. For the other, it urged an official reprimand and review of his security clearance. Only people with classified security clearance were allowed to go inside the room. I'm afraid she doesn't have high enough security clearance for that. In other words, they've had access to all the secret documents and they were not asked for security clearance until now, which is on the eve of the trial. We're going to be here for several hours and then we are going to have to provide security clearance that is acceptable to the FBI, whether we go back to the UK or on to Washington. The watchdog said too many people in Canada have the ability to issue passports, and some of those officials do not have adequate security clearance. Students will get a passport and security clearance on the course, which will also offer them flights in the UK and to European destinations, along with a tour of a European airport. Who would have ever thought he'd even get his security clearance back? She wondered if she could even be trusted with a top-secret security clearance. An intelligence analyst temporarily lost his top-secret security clearance because he faxed his resume using a commercial machine. He had the highest security clearance, which gave him access to extremely sensitive data. And revealing it to someone without proper security clearance or without a need to know is not authorized and is a violation. Synonyms authorization, permission, consent, approval, seal of approval, blessing, acceptance, leave, sanction, licence, dispensation, assent, agreement, concurrence, endorsement, imprimatur 2.2 Permission for an aircraft to take off or land at an airport. （飞机的）起飞（或降落）许可 he took off without air traffic clearance 他未取得空中交通许可就起飞了。 Example sentencesExamples Once the check is completed and everything is found to be acceptable, the crew will be given a clearance to the destination airport. There was no further communication between the aircraft and ATC after the crew acknowledged receiving clearance for the approach. Even so, there's no guarantee of receiving a takeoff clearance. There is no requirement for us to be close to the runway to receive a takeoff clearance. If the airport is open and the tower gives the aircraft and the pilot clearance to land, then the pilot makes the decision whether or not he thinks it's safe. The aircraft received clearance for take-off to Los Angeles at 7.45 am on Tuesday. He had to get the Air Traffic Control clearance and he had to communicate it. As I attempted to respond to the clearance confirmation, we had complete electrical failure! He was asking for permission to land and having gotten the necessary clearance he brought the ship in to one of the huge bays. She climbed up the ladder of the small craft and awaited clearance for takeoff. The doomed plane was the last to be given clearance to take off before the airport was closed due to fog. I need clearance to land a Learjet 35A at any available airport. Obtaining clearance from the local air traffic control, she eased off the tarmac into the air. Synonyms permission, consent, authorization, sanction, warrant, dispensation, concession, indulgence, approval, blessing, agreement, backing, assent, acceptance, confirmation, ratification, mandate, licence, acquiescence, concurrence, liberty, freedom 2.3 The clearing of a person or ship by customs. （人、船只的）结关 Example sentencesExamples A widower, he wanted my help in getting entry clearance for his second wife, from Pakistan. The container has since arrived in Valparaiso where they are awaiting customs clearance. She was granted entry clearance on 11 th December, 1994. Neither had obtained prior entry clearance to the United Kingdom as required. How did these wretched vehicles get customs clearance to enter the Philippines? 2.4 A certificate showing that clearance of a person or ship has been granted. 出（或入）港证 Example sentencesExamples Obviously, these clearances were granted in order to gain propaganda mileage for the elections. 2.5 The process of clearing checks through a clearinghouse. （支票的）兑现 Example sentencesExamples While I was waiting for the last item to go through cheque clearance I put a paperback book up, just to try the market. There are 8,000 banks across Europe, so it will be a number of years before the clearance systems can be fully integrated. The divergence in the transactions covered under the umbrella of money transfer orders contrasts with the system built around cheques and their clearance through banking channels. Finally the banks are going to be forced to come clean and speed up cheque clearance. For more than 11 days the six banks were excluded from the daily inter-bank clearance of cheques. Without waiting for clearance of the cheques it issued the occupation certificate after which the trust stopped payment of the cheques. Synonyms payment, discharge, defrayal, liquidation, settling, settling up, clearing, satisfaction 3Clear space allowed for a thing to move past or under another. 移动空间 always give cyclists plenty of clearance 勿忘常给骑自行车者留出足够的移动空间。 Example sentencesExamples He watches for prop clearance and ensures the aircraft doesn't tilt while fuel is pumped into special bladders. Those 14 record entries are the most in history by a woman and included the first ever clearance of 6 feet. The tunnel has been dogged by controversy over its clearance height, which is lower than the NRA's standard motorway bridge of 5.3 metres. Ground clearance is 205 mm and special features include a newly designed rear tailgate, a dash-mounted handbrake and a CD player as standard. Rear seat passengers have a decent amount of room for a car of this class, with lots of head clearance and no need to be squashed against the backs of the front seats. Depending on the irregularity of the terrain, the operator can adjust both the ground clearance of the machine and height of each step. One is to gain clearance above trees, houses and other obstacles that create turbulence and reduce the power of the wind reaching the wind plant. They're raised with enough clearance so the penguins can waddle under them on the way to their burrows. We quickly stopped the aircraft, with clearance from an approaching obstacle but not much mental comfort. Unique in this segment are 15-inch wheels as standard, for improved ground clearance. In all the designs we examined this time, the maximum clearance for riverborne traffic under the bridge would be around 4.5 metres. For street trees the minimum clearance is often specified by municipal ordinance. They should be perfectly lined up to allow the sash to have just enough clearance for free movement, but not too much. Times have changed and we've also got traffic flow to consider so there had to be enough clearance underneath for cars to pass safely. The smooth curvature allows plenty of cornering clearance. The machines can be grouped side by side with zero clearance between machines to make the best use of limited floorspace. The wire rings add just enough space to create enough clearance between the boards, while still allowing us to put 16 boards in the lunchbox. Aren't there laws concerning boundary wall height, roof clearance, building from boundary distance? And give your trees the same wide clearance - stay well beyond the driplines. The crew chief for the parked aircraft was also observing the wingtip clearance and continued to signal to the marshaller that all was clear, giving a thumbs-up. Synonyms space, gap, room, room to spare, headroom, margin, leeway, allowance, separation, clearing
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