WordReference Random House Unabridged Dictionary of American English © 2026
coun•ter•sue
(koun′tər so̅o̅′),USA pronunciation v., -sued, -su•ing.
v.t.
v.i.
v.t.
- Lawmakingto bring a civil action against (one's complainant).
v.i.
- Lawmakingto bring a civil action against one's complainant.
- counter- + sue