Define mythology . mythology synonyms, mythology pronunciation, mythology translation, English dictionary definition of mythology . n. pl. my·thol·o·gies 1. a. A body or collection of myths belonging to a people and addressing their origin, history, deities, ancestors, and heroes. b. Mythology is the study or collection of myths, especially those from a particular culture or religion. Learn the meaning , synonyms, pronunciation, and usage of mythology with examples from various sources. Although they are related, mythology and religion are not the same. Religion includes worship practices and current faith; mythology collects traditional stories that may or may not have active religious value. Myths are traditional stories about gods and heroes. They often account for the basic aspects of existence — explaining, for instance, how the Earth was created, why people have to die, or why the year is divided into seasons.