knife's edge

A form of knife-edge — A small piece of metal, usually steel, sharpened to an acute edge or angle, and resting on a smooth surface, serving as the fulcrum of a pendulum, scalebeam, or other piece required to oscillate with minimal friction.

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Meanings

nounknife's edge (plural knife's edges)

plural knife's edges

  1. alternativeAlternative form of knife-edge.
Cite this entry
APA

knife's edge. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/knife's%20edge

MLA

“knife's edge.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/knife's%20edge. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “knife's edge,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/knife's%20edge.

Source: knife's edge on Wiktionary, CC BY-SA 4.0.