JJ, the smarty pants poster. 1.adj. Pyr·rhic (pir'ik), of, pertaining to, or resembling Pyrrhus, king of Epirus, or his costly victory. 2.n.an ancient Greek warlike dance in which the motions of actual warfare were imitated. –adj.of, pertaining to, or denoting this dance. 3. adj. consisting of two short or unaccented syllables.