pace·​mak·​er | \ ˈpās-ˌmā-kər How to pronounce pacemaker (audio) \

Definition of pacemaker

1a : one that sets the pace for another
b : one that takes the lead or sets an example
2a : 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

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Other Words from pacemaker

pacemaking \ ˈpās-​ˌmā-​kiŋ How to pronounce pacemaking (audio) \ noun

Synonyms & Antonyms for pacemaker


bellwether, leader, pacer, pacesetter, trendsetter


follower, imitator

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Examples of pacemaker in a Sentence

has long been regarded as a pacemaker in home electronics

Recent Examples on the Web

Henry was able to come home from the hospital after five days, but Foster saw other children who weren't as lucky, children as young as three getting pacemakers, babies connected to wires and monitors. Scott Wartman,, "'We need to step up.' Air Force pilot, daughter of immigrants launches campaign against Steve Chabot," 1 July 2019 Yes, so these are things like a pacemaker powered by something that goes around your heart, or something ... your brain is actually really hard to implant things in. Eric Johnson, Vox, "The problem with tech people who want to solve problems," 26 June 2019 The office also said unpaid bills led to a shortage of pacemakers and surgical anesthesia in the system that operates Stroger Hospital and Provident Hospital in Chicago. Juan Perez Jr.,, "County health officials say IG report was ‘simply wrong’ even as commissioners plan hearings on system’s finances," 27 June 2019 Acetylcholine binds to special pacemaker cells to slow the heart rate down. Anne R. Crecelius, The Conversation, "Why do people faint?," 20 June 2019 The archbishop, who wears a pacemaker and had knee replacement surgery in 2016, has the right under church law to attend his trial, but is not expected to do so. Francis X. Rocca, WSJ, "Vatican Aims to Expedite Trial of U.S. Archbishop," 5 Jan. 2019 The horror story practically writes itself: hacked pacemakers and insulin pumps. David Grossman, Popular Mechanics, "Scientists Design a Network That Lives Inside Your Body," 13 Mar. 2019 The representative further said the hacks against the pacemakers had been addressed. Dan Goodin, Ars Technica, "Hack causes pacemakers to deliver life-threatening shocks," 9 Aug. 2018 In 1960, the company began work on implantable pacemakers, which became the main driver of growth for Medtronic. James R. Hagerty, WSJ, "Medtronic Founder Earl Bakken Turned a Tiny Repair Shop Into a Giant of Medical Technology," 26 Oct. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pacemaker.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of pacemaker

1884, in the meaning defined at sense 1a

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Dictionary Entries near pacemaker


pace egg

pace lap


pace off

pace of life

pace oneself

Statistics for pacemaker

Last Updated

14 Jul 2019

Look-up Popularity

Time Traveler for pacemaker

The first known use of pacemaker was in 1884

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English Language Learners Definition of pacemaker

medical : a small electrical machine put inside a person to make the heart beat evenly


pace·​mak·​er | \ ˈpā-ˌsmā-kər How to pronounce pacemaker (audio) \

Medical Definition of pacemaker

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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More from Merriam-Webster on pacemaker

Rhyming Dictionary: Words that rhyme with pacemaker

Thesaurus: All synonyms and antonyms for pacemaker

Spanish Central: Translation of pacemaker

Nglish: Translation of pacemaker for Spanish Speakers Encyclopedia article about pacemaker

Comments on pacemaker

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characterized by aphorism

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