mortal enemy

noun

: someone one hates very much and for a long time
They've been mortal enemies for many years.

Dictionary Entries Near mortal enemy

mortal combat

mortal enemy

mortal foe/rival

See More Nearby Entries 

Cite this Entry

“Mortal enemy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mortal%20enemy. Accessed 24 Mar. 2023.

Copy Citation

Share

Love words? Need even more definitions?

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

Word of the Day

Listen to the pronunciation of zany

See Definitions and Examples »

Test Your Vocabulary

What Did You Just Call Me?

  • brown chihuahua sitting on the floor with squinting eyes looking at the camera
  • Before we went to her house, Hannah told us her aunt was a flibbertigibbet.
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?

PLAY
Words at Play
Ask the Editors
Word Games