1. a horse or rider that competes in eventing, an equestrian sport combining dressage, cross-country, and show jumping
Usage: chiefly British; equestrian sport
2. a person or organization that organizes or produces events
Usage: informal

Examples

• She trained her horse to become a competitive eventer.
• The eventer cleared every jump in the show-jumping phase.
• Professional eventers spend years perfecting their skills across all three disciplines.
• The eventer organized a charity gala that raised thousands of dollars.
• As an experienced eventer, he knew how to manage large conferences and festivals.