Entry 1 sense Webster, 1913 Anesthesia /ănˌ-ĭs-thēzh'-ə/ · An·es·the·si·a · IPA /ˌæn.əsˈθi.ʒə/ 01 n. Same as Anæsthesia, Anæsthetic. 1. Same as Anæsthesia, Anæsthetic. See: Anæsthesia, Anæsthetic