Entry 1 sense Webster, 1913 Ophthalmologist /äpˌ-thəm-äl'-əj-ĭst/ · Oph·thal·mol·o·gist · IPA /ˌɔf.θə(l)ˈmɑ.lə.d͡ʒɪst/ 01 n. One skilled in ophthalmology; an oculist. 1. One skilled in ophthalmology; an oculist.