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
In a year that has felt like both a marathon and a sprint, the Statesman has honed in on 25 Austin pacemakers who are taking the lead.
—
Ana Gutierrez, Austin American Statesman, 2 July 2025
Thirteen pacemakers surrounded Kipyegon in a constantly shifting formation that sometimes seemed to have no particular shape.
—Alex Hutchinson, Outside Online, 30 June 2025
When the blockage gets particularly bad, patients often need a temporary pacemaker paired with IV antibiotics, says Dr. Sunjya K. Schweig, who’s on the scientific advisory board of the Bay Area Lyme Foundation, a non-profit that aims to accelerate medical breakthroughs for Lyme disease.
—Angela Haupt, Time, 18 June 2025
As Bowen told Rosenbaum, before the pacemaker, her resting heart rate was in the 30s.
—Cara Lynn Shultz, People.com, 1 July 2025
See All Example Sentences for pacemaker
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Ana Gutierrez, Austin American Statesman, 2 July 2025
Thirteen pacemakers surrounded Kipyegon in a constantly shifting formation that sometimes seemed to have no particular shape.
—Alex Hutchinson, Outside Online, 30 June 2025
When the blockage gets particularly bad, patients often need a temporary pacemaker paired with IV antibiotics, says Dr. Sunjya K. Schweig, who’s on the scientific advisory board of the Bay Area Lyme Foundation, a non-profit that aims to accelerate medical breakthroughs for Lyme disease.
—Angela Haupt, Time, 18 June 2025
As Bowen told Rosenbaum, before the pacemaker, her resting heart rate was in the 30s.
—Cara Lynn Shultz, People.com, 1 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 29 Jul. 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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