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 device includes both pacemaker and defibrillator functions: The pacemaker sends electrical impulses to Black’s heart if his heart rate drops too low, while the defibrillator delivers more powerful shocks if his heart rate becomes too high.
—
Dakin Andone, CNN Money, 4 Aug. 2025
The device works like a pacemaker to maintain his heart rhythm.
—Kelly Puente, Nashville Tennessean, 30 July 2025
The Baptist Health location achieved the benchmark in areas such as kidney failure, prostate cancer surgery and back surgery (spinal fusion), while the Mercy facility did so for categories including colon cancer surgery, pacemaker implementation and stroke.
—Nathan Ansell, Arkansas Online, 29 July 2025
Bowen told Rosenbaum that, before receiving a pacemaker, her resting heart rate was in the 30s.
—Stephanie Nolasco, FOXNews.com, 5 July 2025
See All Example Sentences for pacemaker
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Dakin Andone, CNN Money, 4 Aug. 2025
The device works like a pacemaker to maintain his heart rhythm.
—Kelly Puente, Nashville Tennessean, 30 July 2025
The Baptist Health location achieved the benchmark in areas such as kidney failure, prostate cancer surgery and back surgery (spinal fusion), while the Mercy facility did so for categories including colon cancer surgery, pacemaker implementation and stroke.
—Nathan Ansell, Arkansas Online, 29 July 2025
Bowen told Rosenbaum that, before receiving a pacemaker, her resting heart rate was in the 30s.
—Stephanie Nolasco, FOXNews.com, 5 July 2025
See All Example Sentences for pacemaker
Cite this Entry
“Pacemaker.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pacemaker. Accessed 19 Aug. 2025.
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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