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knife-edge

1 ENTRIES FOUND:
knife-edge /ˈnaɪfˌɛʤ/ noun
knife-edge
/ˈnaɪfˌɛʤ/
noun
Learner's definition of KNIFE-EDGE
[singular]
: something that is very narrow or sharp锋利的东西;狭窄的东西

on a/the knife-edge

: in a dangerous or important situation in which two very different results are possible处于危急关头;处于重要时刻;处于摇摆不定的状态

knife-edge

noun

1
: a sharp wedge of steel or other hard material used as a fulcrum for a lever beam in a precision instrument
2
: a sharp narrow knifelike edge

Word History

First Known Use

1818, in the meaning defined at sense 1

Time Traveler
The first known use of knife-edge was in 1818

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