1. a person who competes in triathlons, which are athletic contests consisting of three different events, typically swimming, cycling, and running

Examples

• The triathlete trained for months before the competition.
• She became a professional triathlete after years of amateur racing.
• The triathlete completed the swimming portion in record time.
• Many triathletes follow strict nutrition and training regimens.
• The local triathlete won first place in her age group.
• He decided to become a triathlete after running his first marathon.