Roman emperor 54-68 C.E., born Lucius Domitius Ahenobarbus, noted in history for his tyrannical and cruel disposition and moral depravity, the fire in 64 which destroyed much of Rome and which he was accused of setting, and his persecution of Christians. Related: Neronian; Neronic.

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Definitions of Nero from WordNet

Nero (n.)
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);
Synonyms: Nero Claudius Caesar Drusus Germanicus / Lucius Domitius Ahenobarbus