\ ˈkā How to pronounce kay (audio) \

Definition of kay

 (Entry 1 of 2)

: the letter k
\ ˈkā How to pronounce Kay (audio) \

Definition of Kay (Entry 2 of 2)

: a boastful overbearing knight of the Round Table who is foster brother and seneschal of King Arthur

First Known Use of kay

Noun (1)

14th century, in the meaning defined above

Noun (2)

14th century, in the meaning defined above

Keep scrolling for more

Learn More about kay

Time Traveler for kay

Time Traveler

The first known use of kay was in the 14th century

See more words from the same century

Statistics for kay

Cite this Entry

“Kay.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/kay. Accessed 9 December 2019.

More from Merriam-Webster on kay

Rhyming Dictionary: Words that rhyme with kay

Comments on kay

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


contradictory or incongruous words

Get Word of the Day daily email!

Test Your Vocabulary

Semantic Drift Quiz

  • a twisty river
  • Which of the following was once a synonym for fun?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

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

Love words? Need even more definitions?

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