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
He was subsequently fitted with an Implantable Cardioverter Defibrillator (ICD) device – a type of pacemaker intended to prevent fatal cardiac arrests by discharging a jolt to restore regular heart rhythm – and eventually returned to play top-flight soccer after less than a year.
—
Ben Church, CNN Money, 8 June 2026
The downside of having a pacemaker is that getting one requires surgery, as well as having the device permanently implanted.
—Alex Knapp, Forbes.com, 5 June 2026
The device is not for users with active implantable medical devices such as pacemakers or hearing aid implants; users with metallic implants such as stents, bone plates or bone screws at or near the neck; or users operating another device like a TENS unit or muscle stimulator at the same time.
—Samantha Agate, Sacbee.com, 3 June 2026
The Queen previously had a pacemaker installed in January 2025.
—Meredith Kile, PEOPLE, 1 June 2026
See All Example Sentences for pacemaker
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Ben Church, CNN Money, 8 June 2026
The downside of having a pacemaker is that getting one requires surgery, as well as having the device permanently implanted.
—Alex Knapp, Forbes.com, 5 June 2026
The device is not for users with active implantable medical devices such as pacemakers or hearing aid implants; users with metallic implants such as stents, bone plates or bone screws at or near the neck; or users operating another device like a TENS unit or muscle stimulator at the same time.
—Samantha Agate, Sacbee.com, 3 June 2026
The Queen previously had a pacemaker installed in January 2025.
—Meredith Kile, PEOPLE, 1 June 2026
See All Example Sentences for pacemaker
Cite this Entry
“Pacemaker.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pacemaker. Accessed 9 Jun. 2026.
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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