Entry 1 sense Webster, 1913 Inevitability /ĭnˌ-ĕvˌ-ĭt-əb-ĭl'-ĭt-ē/ · In·ev·i·ta·bil·i·ty · IPA /ɪˌnɛvɪtəˈbɪlɪti/ 01 n. Impossibility to be avoided or shunned; inevitableness. 1. Impossibility to be avoided or shunned; inevitableness.