Entry 1 sense Webster, 1913 Scientist /sī'-ən-tĭst/ · Sci·en·tist · IPA /ˈsaɪəntəst/ 01 n. One learned in science; a scientific investigator; one devoted to scientific study; a savant. 1. One learned in science; a scientific investigator; one devoted to scientific study; a savant.[Recent]