knife-edge

noun
\ ˈnīf-ˌej How to pronounce knife-edge (audio) \

Definition of knife-edge

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

First Known Use of knife-edge

1818, in the meaning defined at sense 1

Buying Guide

Our Reviews team has selected the best utility knives.

Learn More About knife-edge

Time Traveler for knife-edge

Time Traveler

The first known use of knife-edge was in 1818

See more words from the same year

Dictionary Entries Near knife-edge

knife-boy

knife-edge

knife-edged

See More Nearby Entries 

Statistics for knife-edge

Cite this Entry

“Knife-edge.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/knife-edge. Accessed 18 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Name That Color

  • a light greenish blue color
  • Name that color:
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!