/ Dictionary / Index C countermeasure: Meaning and Definition of Find definitions for: coun•ter•meas•ure Pronunciation: (koun'tur-mezh"ur), [key] — n. an opposing, offsetting, or retaliatory measure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: countermeasure (Thesaurus) countermark countermelody Related Content Daily Word Quiz: knead Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language