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
Still the pacemaker project remains secure, Rytkin said, thanks to Northwestern and interest from the national scientific community.
—
Zareen Syed, Chicago Tribune, 7 June 2025
The last event recorded on Hackman's pacemaker occurred Feb. 17.
—Shania Russell, EW.com, 28 Apr. 2025
Conventionally, temporary pacemakers comprise electrodes that are implanted in the heart muscle.
—Payal Dhar, Scientific American, 2 Apr. 2025
Arakawa is believed to have died first, around Feb. 11, while Hackman seemingly died about a week later, as the last activity on his pacemaker was recorded on Feb. 18.
—Brendan Morrow, USA TODAY, 17 Mar. 2025
See All Example Sentences for pacemaker
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Zareen Syed, Chicago Tribune, 7 June 2025
The last event recorded on Hackman's pacemaker occurred Feb. 17.
—Shania Russell, EW.com, 28 Apr. 2025
Conventionally, temporary pacemakers comprise electrodes that are implanted in the heart muscle.
—Payal Dhar, Scientific American, 2 Apr. 2025
Arakawa is believed to have died first, around Feb. 11, while Hackman seemingly died about a week later, as the last activity on his pacemaker was recorded on Feb. 18.
—Brendan Morrow, USA TODAY, 17 Mar. 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 4 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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