What does "countersuit" mean?

A lawsuit filed against a party that has filed a suit against one.

What is a synonym for "countersuit"?

Common synonyms include: counterclaim, counterlawsuit.

noun

noun ·3 syllables ·Rare ·Advanced level

Noun

1
A lawsuit filed against a party that has filed a suit against one.
"Stanford, which filed a countersuit against the two men seeking repayment of certain loans, denied the men’s accusations."
2
a suit brought against someone who has sued you wordnet

"Stanford, which filed a countersuit against the two men seeking repayment of certain loans, denied the men’s accusations."

From counter- + suit.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.