leftist Syllabification: (left·ist)Pronunciation: /ˈleftist/Translate leftist | into Italian Definition of leftist noun a person who supports the political views or policies of the left. adjective supportive of the political views or policies of the left:leftist radicalsDerivatives leftismPronunciation: /-ˌtizəm/ noun leftist in other Oxford dictionaries Definition of leftist in the British & World English dictionary