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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 knife-edge /ˈnaɪfˌɛʤ/
 刀口,刃形邊緣;鋒利的邊緣;刃形支承

From: Webster's Revised Unabridged Dictionary (1913)

 Knife-edge n. Mech. A piece of steel sharpened to an acute edge or angle, and resting on a smooth surface, serving as the axis of motion of a pendulum, scale beam, or other piece required to oscillate with the least possible friction.
 Knife-edge file. See Illust. of File.
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From: WordNet (r) 2.0

 knife-edge
      n : a narrow boundary; "he lived on a knife-edge between genius
          and insanity"