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
Scientists at what university have developed an experimental cardiac pacemaker that is as small as a sesame seed?
—
CNN Money, 10 Apr. 2025
That means items like pacemakers, insulin pumps and hearing aids are likely to get more expensive.
—Amy Feldman, Forbes.com, 9 Apr. 2025
Temporary pacemakers are often required after heart surgery or while waiting for a permanent pacemaker.
—Margherita Bassi, Smithsonian Magazine, 4 Apr. 2025
After surgery, the infants typically need a pacemaker for about a week while their hearts heal.
—Lisa Schencker, Chicago Tribune, 3 Apr. 2025
See All Example Sentences for pacemaker
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CNN Money, 10 Apr. 2025
That means items like pacemakers, insulin pumps and hearing aids are likely to get more expensive.
—Amy Feldman, Forbes.com, 9 Apr. 2025
Temporary pacemakers are often required after heart surgery or while waiting for a permanent pacemaker.
—Margherita Bassi, Smithsonian Magazine, 4 Apr. 2025
After surgery, the infants typically need a pacemaker for about a week while their hearts heal.
—Lisa Schencker, Chicago Tribune, 3 Apr. 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 27 Apr. 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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