| Definition of 'knife-edge' |
Princeton's WordNet |
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1. (noun) knife-edge
a narrow boundary
"he lived on a knife-edge between genius and insanity"
2. (noun) knife edge, cutting edge
the sharp cutting side of the blade of a knife
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| Definition of 'knife-edge' |
Webster Dictionary |
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1. (noun) knife-edge
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
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Definitions of knife-edge 
