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
As Bowen told Rosenbaum, before the pacemaker, her resting heart rate was in the 30s.
—
Cara Lynn Shultz, People.com, 1 July 2025
She was supported by pacemakers and equipped with Nike’s latest innovations, from her aerodynamic track suit to her spikes.
—Samuel Petrequin, Baltimore Sun, 26 June 2025
Running in an aerodynamic suit and a new pair of super-light Nike spikes, Kipyegon was supported by pacemakers on the Charléty Stadium track in Paris – all of which were intended to maximize her performance over the mile.
—George Ramsay, CNN Money, 26 June 2025
The final drafting formation involved 13 pacemakers, including 11 men and two women, all of them decorated international runners—including Olympic medalists Georgia Hunter Bell and Grant Fisher.
—Alex Hutchinson, Outside Online, 26 June 2025
See All Example Sentences for pacemaker
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Cara Lynn Shultz, People.com, 1 July 2025
She was supported by pacemakers and equipped with Nike’s latest innovations, from her aerodynamic track suit to her spikes.
—Samuel Petrequin, Baltimore Sun, 26 June 2025
Running in an aerodynamic suit and a new pair of super-light Nike spikes, Kipyegon was supported by pacemakers on the Charléty Stadium track in Paris – all of which were intended to maximize her performance over the mile.
—George Ramsay, CNN Money, 26 June 2025
The final drafting formation involved 13 pacemakers, including 11 men and two women, all of them decorated international runners—including Olympic medalists Georgia Hunter Bell and Grant Fisher.
—Alex Hutchinson, Outside Online, 26 June 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 18 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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