locknut

noun
lock·​nut | \ ˈläk-ˌnət \

Definition of locknut 

1 : a nut screwed down hard on another to prevent it from slacking back
2 : a nut so constructed that it locks itself when screwed tight against another part

First Known Use of locknut

1855, in the meaning defined at sense 1

Keep scrolling for more

Learn More about locknut

Statistics for locknut

Look-up Popularity

Time Traveler for locknut

The first known use of locknut was in 1855

See more words from the same year

More from Merriam-Webster on locknut

Rhyming Dictionary: Words that rhyme with locknut

Comments on locknut

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

WORD OF THE DAY

involving abstract or general statements

Get Word of the Day daily email!

Test Your Vocabulary

Liar, Liar Quiz

  • alt-5761dbe2ba986
  • Someone who pretends to be sick in order to avoid work is a:
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

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!