Entry 2 senses · 2 variants Webster, 1913 Jerkin · Jer·kin · IPA /ˈd͡ʒɝ.kɪn/ n. n. 01 n. A jacket or short coat; a close waistcoat. 1. A jacket or short coat; a close waistcoat. 02 n. A male gyrfalcon. 1. A male gyrfalcon.(Zool.)