knife-edge

noun

ˈnīf-ˌej 

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

In Maine, Michigan, Iowa, Ohio and even Georgia — where Senate races are on a knife-edge or already lost — Canada is the state’s largest international trading partner. — Kate Andrews, Washington Post, 1 Nov. 2026

The election in Israel remains on a knife-edge and there is still a strong chance Benjamin Netanyahu could be asked to form the next government. — Max Goldbart, Deadline, 28 Oct. 2026

For an eclipse chaser who values that, scenery over duration, or relative quiet, this geographical knife-edge could be appealing. — Jamie Carter, Space.com, 10 Oct. 2026

When a boat is balancing on the absolute knife-edge of foiling flight in light air, the priorities change massively, and this is when Fletcher is grateful for the extra help from the booth. — Andrew Rice, New York Times, 15 Sep. 2026

Word History

First Known Use

1818, in the meaning defined at sense 1

Rhymes for knife-edge

• allege
• straightedge
• dredge
• edge
• hedge
• ledge
• pledge
• sedge
• sledge
• wedge

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)