adj. & n.
adj. of or relating to ancient Troy in Asia Minor.
n. 1 a native or inhabitant of Troy. 2 a person who works, fights, etc. courageously (works like a Trojan). Trojan Horse 1 a hollow wooden horse said to have been used by the Greeks to enter Troy. 2 a person or device planted to bring about an enemy's downfall.
[ ME f. L Troianus f. Troia Troy ]