Entry 1 sense Webster, 1913 Pugnacious /pəg-năsh'-ĭs/ · Pug·na·cious · IPA /pʌɡˈneɪ.ʃəs/ 01 a. Disposed to fight; inclined to fighting; quarrelsome; fighting. 1. Disposed to fight; inclined to fighting; quarrelsome; fighting.