castmate From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounSomeone with whom one performs together, as a member of a cast Related wordsSynonymscastmembercastercoactorcastellerfan castcastlercostarcrewmemberworkmatecablecastercrewactercoparticipanthostcopresenterensemblist References Wiktionary — castmate Wikipedia — castmate