Entry 2 senses · 2 variants Webster, 1913 leftist · IPA /ˈlɛf.tɪst/ adj. n. 01 adj. same as left-wing. 1. same as left-wing. See: left-wing Syn. left-of-center, left-wing. 02 n. a person who belongs to the political left. 1. a person who belongs to the political left. Syn. socialist, collectivist, left-winger.