gladiatorPronunciation: /ˈgladɪeɪtə/Translate gladiator | into Italian Definition of gladiator noun (in ancient Rome) a man trained to fight with weapons against other men or wild animals in an arena. Derivatives gladiatorialPronunciation: /ˌgladɪəˈtɔːrɪəl/ adjective Origin: late Middle English: from Latin, from gladius 'sword'gladiator in other Oxford dictionaries Definition of gladiator in the US English dictionary