pacemaker
🇺🇸
/ˈpeɪsmeɪkər/
🇬🇧
/ˈpeɪsmeɪkə(r)/
A small device that doctors put inside someone's body to help their heart beat in the right way
My grandmother got a pacemaker put in to help her heart beat properly.
Someone or something that starts fast in races to set the speed for others
In the race, a pacemaker was used so runners would try to keep up with a fast pace.
The leading person or team in a competition
Our team is the pacemaker this season, leading by three games.