1Denoting a seat in a theatre or other public place that is designed to tilt up vertically when unoccupied so as to let people pass easily.
（座位不用时）可翻起的
Example sentencesExamples
There was no cushioned seats or tip-up seats.
The players scavenged driftwood and even raided a timberyard at night for materials, while 74 tip-up seats were donated by the local cinema.
It was the first London theatre to have carpeted floors and tip-up seats and was built without pillars so that there was a clear view from every seat.
But unless they are pointed out beneath the tip-up seats in the Choir, most visitors to Ripon Cathedral miss the carvings made by medieval craftsmen.
In the 1960s, during his first football chairmanship, at Oldham Athletic, he advocated refreshment bars, executive boxes and tip-up seats.
In the choir and transepts black marble shafts are striking detail, while the intricately carved choir stalls of 1520 have tip-up misericord seats decorated with secular scenes.
The American film festival runs 24 / 7, everywhere there is a projector and a row of tip-up seats.
Incidentally, the tip-up mechanism on those rear seats has nothing in common with the tip-up mechanism favoured in cinemas which, one can see, would not have taken to the road particularly well.
The tip-up seat pieces, which were changed periodically, frequently incorporated text, too.
1.1Denoting a rear platform of a truck or lorry that may be raised up, enabling a load to be discharged.
（卡车，货车）后斗可翻起卸货的
Example sentencesExamples
A colleague, who was sitting with him, escaped from the tip-up lorry which rolled forward and struck a lamppost, knocking it towards a loyalist paramilitary mural near where the bar once stood.
noun
North American
A device used in ice fishing in which a wire attached to the rod is tripped, raising a signal flag, when a fish takes the bait.
〈北美〉（冰下捕鱼时显示鱼上钩的）提起信号旗的装置
Example sentencesExamples
If you are energetic an have a second hole you can also use a tip-up.
The lazy man's approach is to use a spring loaded tip-up but that is about as much fun as watching paint dry.
Definition of tip-up in US English:
tip-up
nounˈtip ˌəpˈtɪp ˌəp
North American
A device used in ice fishing in which a wire attached to the rod is tripped, raising a signal flag, when a fish takes the bait.
〈北美〉（冰下捕鱼时显示鱼上钩的）提起信号旗的装置
Example sentencesExamples
The lazy man's approach is to use a spring loaded tip-up but that is about as much fun as watching paint dry.
If you are energetic an have a second hole you can also use a tip-up.