Added 10 October 2026 octavian noun Categories: PeopleRare Words noun ! Definition from WordNet 3.1, Princeton University. More about octavian at Wordnik → Where our words come from → Roman statesman who established the Roman Empire and became emperor in 27 BC; defeated Mark Antony and Cleopatra in 31 BC at Actium (63 BC - AD 14). Related Words: augustusoctaveoctaviusagustusaugustaurelianoctaviajuliusaugustacaesar Back to today's word