cotter pin

noun

Definition of cotter pin 

: a half-round metal strip bent into a pin whose ends can be flared after insertion through a slot or hole

First Known Use of cotter pin

1881, in the meaning defined above

Keep scrolling for more

Learn More about cotter pin

Share cotter pin

Statistics for cotter pin

Look-up Popularity

Time Traveler for cotter pin

The first known use of cotter pin was in 1881

See more words from the same year

More from Merriam-Webster on cotter pin

See words that rhyme with cotter pin

Britannica.com: Encyclopedia article about cotter pin

Comments on cotter pin

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

WORD OF THE DAY

a private place of worship

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Syn City

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!