Entry 1 sense Webster, 1913 Accessibility /ăkˌ-sĕs-əb-ĭl'-ĭt-ē/ · Ac·cess·i·bil·i·ty · IPA /əkˌsɛs.əˈbɪl.ə.ti/ 01 n. The quality of being accessible, or of admitting approach; receptibility. 1. The quality of being accessible, or of admitting approach; receptibility.