Entry 1 sense Webster, 1913 Sociologist /sōsˌ-ē-äl'-əj-ĭst/ · So·ci·ol·o·gist · IPA /sˌoʊsiːˈɑlədʒɪst/ 01 n. One who treats of, or devotes himself to, the study of sociology. 1. One who treats of, or devotes himself to, the study of sociology.