Titus1Pronunciation: /ˈtʌɪtəs/Definition of Titus ( ad 39-81), Roman emperor 79-81, son of Vespasian; full name Titus Vespasianus Augustus; born Titus Flavius Vespasianus. In 70 he ended a revolt in Judaea with the conquest of Jerusalem. Titus in other Oxford dictionaries Definition of Titus in the US English dictionary