† imˈpugnant,ppl.a.Obs.rare—1. [ad. L. impugnāns, impugnānt-em, or corresponding It.impugnante, pres.pple. of impugnāre to oppose, impugn.] Repugnant, opposed. 1579Fenton Guicciard. ii. (1599) 95 Whether you ought to be the personage so impugnant and contrary to your proper resolution.