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

Keep scrolling for more

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

Statistics for knife-edge

Cite this Entry

“Knife-edge.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/knife-edge. Accessed 23 Jan. 2021.

Keep scrolling for more

More Definitions for knife-edge

knife-edge

noun
How to pronounce knife-edge (audio)

English Language Learners Definition of knife-edge

: something that is very narrow or sharp

Comments on knife-edge

What made you want to look up knife-edge? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

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!