1. small electronic devices implanted in the chest to regulate heartbeat
Usage: medical
2. people or things that set the speed or pace in a race or activity

Examples

• The cardiologist recommended pacemakers for both elderly patients.
• Modern pacemakers can last up to ten years before needing replacement.
• The runners followed the pacemakers for the first half of the marathon.
• These companies are pacemakers in developing renewable energy technology.
• Her grandfather’s pacemaker helps regulate his irregular heartbeat.
• The pacemakers maintained a steady speed throughout the race.
• Doctors monitor patients with pacemakers through regular checkups.