/ Dictionary / Index C countersue: Meaning and Definition of Find definitions for: coun•ter•sue Pronunciation: (koun'tur-s"), [key] — v., -sued, -su•ing. —v.t. to bring a civil action against (one's complainant). —v.i. to bring a civil action against one's complainant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. countersubject counter table Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language