English Dictionary

knife-edge

noun

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.

He balanced on the knife-edge of success and failure.

意味（1）

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.

意味（2）

(figuratively) A precarious balance that could be upset by a very small force in either direction.

The game was on a knife-edge.

意味（3）

Used other than figuratively or idiomatically: the edge of a knife.