Entry 1 sense Webster, 1913 Invulnerability /ĭnˌ-vŭlˌ-nẽr-əb-ĭl'-ĭt-ē/ · In·vul·ner·a·bil·i·ty · IPA /ˌɪnvˌʌlnərəbˈɪlɪtiː/ 01 n. Quality or state of being invulnerable. 1. Quality or state of being invulnerable.