TrojanPronunciation: /ˈtrəʊdʒ(ə)n/Definition of Trojan adjective relating to ancient Troy in Asia Minor:Trojan legends noun 1a native or inhabitant of ancient Troy: I’ll be working like a Trojan for the next twelve weeks 2 Computing a Trojan Horse program. Phrases work like a Trojan (or Trojans) work extremely hard. Origin: Middle English: from Latin Troianus, from Troia 'Troy'Trojan in other Oxford dictionaries Definition of Trojan in the US English dictionary