noun
the sharp cutting side of the blade of a knife
• Syn: ↑cutting edge
• Hypernyms: ↑edge
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1. the cutting edge of a knife.
2. anything very sharp.
3. a wedge on the fine edge of which a scale beam, pendulum, or the like, balances or oscillates.
[1810-20]
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knife edge,
1. the edge of a knife.
2. anything very sharp.
3. a wedge on the fine edge of which a pendulum, scale beam, or the like is hung.
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n. the edge of a knife
■ [as adj.] (of creases or pleats in a garment) very fine
knife-edge creases
■ [in sing.] a tense or uncertain situation, esp. one finely balanced between success and failure
they have been living on a knife edge since his libel action
■ a steel wedge on which a pendulum or other device oscillates or is balanced
■ a narrow, sharp ridge; an arête
Useful english dictionary. 2012.