Entry 1 sense Webster, 1913 Acceptability /ək-sĕpˌ-təb-ĭl'-ət-ē/ · Ac·cept·a·bil·i·ty · IPA /ˌækˌsɛp.təˈbɪl.ət.i/ 01 n. The quality of being acceptable; acceptableness. 1. The quality of being acceptable; acceptableness.