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
It could be used in the creation of next-generation bioelectronic devices or internal medical tools, like pacemakers, implantable glucose sensors, and brain electrodes used for treating neurological conditions like Parkinson’s disease.
—
Mrigakshi Dixit, Interesting Engineering, 6 Nov. 2025
The risk of disrupting a pacemaker is negligible.
—Ed Masley, AZCentral.com, 4 Nov. 2025
This isn’t how pacemakers are designed to work, apparently.
—Joy Williams, Harpers Magazine, 24 Oct. 2025
Earlier that year, Rune Elmqvist had invented this particular pacemaker, designed to be implanted in a subcutaneous pouch in a patient suffering a cardiac disease.
—Scott Lafee, San Diego Union-Tribune, 7 Oct. 2025
See All Example Sentences for pacemaker
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Mrigakshi Dixit, Interesting Engineering, 6 Nov. 2025
The risk of disrupting a pacemaker is negligible.
—Ed Masley, AZCentral.com, 4 Nov. 2025
This isn’t how pacemakers are designed to work, apparently.
—Joy Williams, Harpers Magazine, 24 Oct. 2025
Earlier that year, Rune Elmqvist had invented this particular pacemaker, designed to be implanted in a subcutaneous pouch in a patient suffering a cardiac disease.
—Scott Lafee, San Diego Union-Tribune, 7 Oct. 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 13 Nov. 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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