tilapiaPronunciation: /tɪˈleɪpɪə, -ˈlap-/Definition of tilapia noun an African freshwater cichlid fish that has been widely introduced to many areas for food, such as St Peter’s fish. Tilapia and related genera, family Cichlidae: several species Origin:modern Latin, of unknown origintilapia in other Oxford dictionaries Definition of tilapia in the US English dictionary