Added 10 October 2026 nero noun Categories: PeopleRare Words noun ! Definition from WordNet 3.1, Princeton University. More about nero at Wordnik → Where our words come from → Roman Emperor notorious for his monstrous vice and fantastic luxury (was said to have started a fire that destroyed much of Rome in 64) but the Roman Empire remained prosperous during his rule (37-68). Related Words: blackniroebonyjetinkycoal-blackpitch-blacksableravenmidnightsoot-blackcharcoal Back to today's word