mythologist myt·ho·lo·gist UK/mɪˈθɒl.ə.d͡ʒɪst/ US/mɪˈθɑl.ə.d͡ʒɪst/ uncommon noun 1. an expert on mythology Related words Broader terms expert Narrower terms Campbell WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.