pacemaker
noun
pace·mak·er
ˈpās-ˌmā-kər 
1
a
: one that sets the pace for another
b
: one that takes the lead or sets an example
2
a
: a group of cells or a body part (such as the sinus node of the heart) that serves to establish and maintain a rhythmic activity
b
: an electrical device for stimulating or steadying the heartbeat or reestablishing the rhythm of an arrested heart
Examples of pacemaker in a Sentence
has long been regarded as a pacemaker in home electronics
Recent Examples on the Web
The MorphoScan is even missing a couple of quality-of-life features present on the Etekcity scale, including a safe mode for pregnant women and pacemaker users that disables the BIA electrical current for weight-only measurements.
—
Andrew Gebhart, PC Magazine, 5 Apr. 2026
His run last month with his wife was a marathon in Antarctica, and the ultra-endurance athlete — with more than a hundred marathons to his credit — has spent the last nine years running with a pacemaker.
—Joseph States, Chicago Tribune, 3 Apr. 2026
At roughly the same time as her doorbell camera disconnected, the woman’s pacemaker disconnected from her phone.
—Giulia Carbonaro, MSNBC Newsweek, 31 Mar. 2026
For context, lithium-ion batteries also drove nuclear pacemakers out of the market for the same reason.
—David Szondy
march 28, New Atlas, 28 Mar. 2026
See All Example Sentences for pacemaker
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Andrew Gebhart, PC Magazine, 5 Apr. 2026
His run last month with his wife was a marathon in Antarctica, and the ultra-endurance athlete — with more than a hundred marathons to his credit — has spent the last nine years running with a pacemaker.
—Joseph States, Chicago Tribune, 3 Apr. 2026
At roughly the same time as her doorbell camera disconnected, the woman’s pacemaker disconnected from her phone.
—Giulia Carbonaro, MSNBC Newsweek, 31 Mar. 2026
For context, lithium-ion batteries also drove nuclear pacemakers out of the market for the same reason.
—David Szondy
march 28, New Atlas, 28 Mar. 2026
See All Example Sentences for pacemaker
Cite this Entry
“Pacemaker.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pacemaker. Accessed 15 Apr. 2026.
Copy CitationKids Definition
pacemaker
noun
pace·mak·er
ˈpā-ˌsmā-kər
1
: a group of cells or a bodily part (as of the heart) that serves to establish and maintain a rhythmic bodily activity
2
: an electrical device for steadying or establishing the heartbeat
Medical Definition
pacemaker
noun
pace·mak·er
ˈpā-ˌsmā-kər
1
: a group of cells or a body part (as the sinoatrial node of the heart) that serves to establish and maintain a rhythmic activity
2
: an electrical device for stimulating or steadying the heartbeat or reestablishing the rhythm of an arrested heart
called also pacer
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