knife-edge

noun

1
: a sharp wedge of steel or other hard material used as a fulcrum for a lever beam in a precision instrument
2
: a sharp narrow knifelike edge

Examples of knife-edge in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Hansen, the University of Chicago political scientist, said the Republican caucus has held up well over the last year, considering its knife-edge majority. Daniel C. Vock, Chicago Tribune, 13 Feb. 2026 This is probably mostly right—studios’ appetite for risk keeps shrinking, sequels and reboots are favored over original films, and the days of out-of-control productions dancing on the knife-edge of catastrophe may well be behind us. Michael O’Donnell, The Atlantic, 10 Feb. 2026 That scene, where Cain and Derek go conversationally toe-to-toe, is one of the film’s sharpest knife-edge moments. Craig McLean, Variety, 4 Dec. 2025 Its thin exosphere offers almost no protection from solar radiation, making this twilight boundary a literal knife-edge of danger. Kaif Shaikh, Interesting Engineering, 13 Nov. 2025 Serbia travels to England, sat third in UEFA qualifying Group K, one point behind Albania, and with its qualification chances balanced on a knife-edge. Ben Verbrugge, MSNBC Newsweek, 13 Nov. 2025 The writing dances on a knife-edge as religious piety and saintly delusion rub elbows. Craig Jenkins, Vulture, 7 Nov. 2025 Even for athletes who’ve spent a lifetime climbing mountains, traversing sheer cliffs, balancing on knife-edge ridgelines, this fear never disappears. Outside Online, 5 Nov. 2025 The movie tries to pick up the threads of previous films, but, in attempting to make Myers more mystical, this film robs him of his knife-edge menace. Chris Snellgrove, Entertainment Weekly, 25 Oct. 2025

Word History

First Known Use

1818, in the meaning defined at sense 1

Time Traveler
The first known use of knife-edge was in 1818

Browse Nearby Words

Cite this Entry

“Knife-edge.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/knife-edge. Accessed 23 Feb. 2026.

Kids Definition

knife-edge

noun
ˈnī-ˌfej
: a sharp wedge usually of steel used as a support for a lever beam in a very exact instrument (as a balance)
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