pacemaker
nounUK /ˈpeɪsˌmeɪkə/
US /ˈpeɪsˌmeɪkər/
A pacemaker is a small machine that helps a person's heart beat at the right speed.
After the surgery, Grandpa's pacemaker keeps his heart beating steadily.
RELATED WORDS
OTHER MEANINGS
2. A person or thing that sets the speed or example for others to follow.
She was the pacemaker of the project, keeping everyone on schedule.
3. A runner who sets a fast speed at the start of a race to help others run faster.
The pacemaker led the pack for the first two miles of the marathon.
4. A small electronic device that sends regular signals to control a machine or process.
The engineer installed a pacemaker to keep the factory robot moving at a steady rate.