coun·​ter·​suit | \ ˈkau̇n-tər-ˌsüt How to pronounce countersuit (audio) \
variants: or less commonly counter-suit
plural countersuits also counter-suits

Definition of countersuit

: an opposing lawsuit especially : a claim asserted by an opposing party in a lawsuit (such as a defendant) against the party bringing the original lawsuit (such as a plaintiff) : counterclaim decided to file a countersuit against her accuser The current appeal results from a patent infringement suit and countersuit between Apple Inc. ("Apple") and Samsung Electronics Co … Apple, Inc. v. Samsung Electronics Co., Ltd.

First Known Use of countersuit

1846, in the meaning defined above

Keep scrolling for more

Learn More about countersuit

Statistics for countersuit

Look-up Popularity

Time Traveler for countersuit

The first known use of countersuit was in 1846

See more words from the same year

More from Merriam-Webster on countersuit

Rhyming Dictionary: Words that rhyme with countersuit

Comments on countersuit

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


one from the Upper Peninsula of Michigan

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

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!