Entry 1 sense Webster, 1913 Admissibility /əd-mĭsˌ-əb-ĭl'-ət-ē/ · Ad·mis·si·bil·i·ty · IPA /ədˌmɪsəˈbɪləti/ 01 n. The quality of being admissible; admissibleness; as, the admissibility of evidence. 1. The quality of being admissible; admissibleness; as, the admissibility of evidence.