Entry 1 sense Webster, 1913 Vestigial /vĕ-stĭjʹĭ-əl/ · Ves·tig·i·al · IPA /vɛˈstɪd͡ʒɪəl/ 01 a. Of or pertaining to a vestige or remnant; like a vestige. 1. Of or pertaining to a vestige or remnant; like a vestige.