Pronunciation: (trī-ath'lun), [key]
1. an athletic contest comprising three consecutive events, usually swimming, bicycling, and distance running.
2. a women's track-and-field competition comprising the 100-meter dash, high jump, and shot put.
3. Brit.a competition comprising fly-casting, horseback-riding, and trapshooting events.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.