naturalist Syllabification: (nat·u·ral·ist)Pronunciation: /ˈnaCHərəlist/Translate naturalist | into German | into Italian | into Spanish Definition of naturalist noun 1an expert in or student of natural history. 2a person who practices naturalism in art or literature. a person who adopts philosophical naturalism. adjective another term for naturalistic.naturalist in other Oxford dictionaries Definition of naturalist in the British & World English dictionary