- one of three copies; any of three things that correspond to one another exactly
- reproduce threefold; "triplicate the letter for the committee"
- Triplicate (foaled 1941) was an American Thoroughbred racehorse. He was sired by the 1928 American Horse of the Year and U.S. Racing Hall of Fame inductee, Reigh Count. His dam was Fairday, a daughter of another Hall of Fame inductee, Fair Play.
- Each of a set of three identical objects or copies; To make three identical copies of something; To triple