Entry 4 senses · 3 variants Webster, 1913 Gab /(găb)/ · IPA /ɡæb/ n. n. v. i. 01 n. The hook on the end of an eccentric rod opposite the strap. See. Illust. of Eccentric. 1. The hook on the end of an eccentric rod opposite the strap. See. Illust. of Eccentric.(Steam Engine) See: Eccentric 02 n. The mouth; hence, idle prate; chatter; unmeaning talk; loquaciousness. 1. The mouth; hence, idle prate; chatter; unmeaning talk; loquaciousness.[Colloq.] Phrases & compounds Gift of gab — facility of expression. 03 v. i. To deceive; to lie. 1. To deceive; to lie.[Obs.] 2. To talk idly; to prate; to chatter.