idiolectEnglishOxford New American Dictionaryidiolect /ˈidēəˌlekt, ˈɪdiəˌlɛkt / ▸ noun the speech habits peculiar to a particular person: in his strange idiolect, he preferred to call angels “angelicals“. – ORIGIN 1940s : from idio- ‘own, personal’ + -lect as in dialect.