1. a horse trained to move at a specific gait where both legs on the same side move together
Usage: horse racing
2. a person who sets or maintains a steady pace, especially in running or other activities
3. a person who walks back and forth repeatedly

Examples

• The pacer won the harness race by maintaining perfect form.
• She hired a pacer to help her achieve her marathon goal time.
• The experienced pacer guided the running group through their training.
• He was a nervous pacer, walking back and forth while waiting for news.
• The pacer’s steady rhythm helped the other runners stay on track.
• At the track, the pacer demonstrated the distinctive gait to spectators.