Tro"jan (?), a. [L. Trojanus, fr. Troja, Troia, Troy, from Tros, Gr. Trw`s, Trwo`s, Tros, the mythical founder of Troy.] Of or pertaining to ancient Troy or its inhabitants. -- n. A native or inhabitant of Troy.

Tro"jan (?), n. One who shows the pluck, endurance, determined energy, or the like, attributed to the defenders of Troy; -- used chiefly or only in the phrase like a Trojan; as, he endured the pain like a Trojan; he studies like a Trojan.

Tro"jan (?), a. [L. Trojanus, fr. Troja, Troia, Troy, from Tros, Gr. Trw`s, Trwo`s, Tros, the mythical founder of Troy.] Of or pertaining to ancient Troy or its inhabitants. -- n. A native or inhabitant of Troy.

Tro"jan (?), n. One who shows the pluck, endurance, determined energy, or the like, attributed to the defenders of Troy; -- used chiefly or only in the phrase like a Trojan; as, he endured the pain like a Trojan; he studies like a Trojan.

• (computing) Software disguised as harmless (e.g. "Screen Blanker") developed to allow unauthorized access to a computer through a backdoor (e.g. Internet port).
  

• a native or inhabitant of the ancient city of Troy
  
• a student (especially an athlete) of the University of Southern California
  
• a brand of condoms
  
• relating to the city Troy