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

Victoria McCullough, 69, of Escondido, California, was one of the first to receive a pacemaker-like device that stimulates a nerve to push the tongue forward during sleep. Washington Post, "New ways to conquer sleep apnea compete for place in bedroom," 12 July 2018 Boston Scientific is one of the biggest makers of heart devices such as pacemakers and artery-opening stents, competing with Medtronic PLC and Abbott Laboratories . Denise Roland, WSJ, "Boston Scientific Acquires U.K.’s BTG for $4.2 Billion," 20 Nov. 2018 That was the spark for what later became an implantable pacemaker that has improved and saved countless lives. The Editorial Board, WSJ, "Earl Bakken, Pacemaker," 28 Oct. 2018 That could lead the way to self-powered pacemakers. William Herkewitz, Popular Mechanics, "Rubbery Power Source Makes Electricity When It Bends," 17 June 2016 In most people, this master pacemaker runs slightly longer than 24 hours. Emily Sohn, Washington Post, "Time-zone changes can leave people worried about jet lag," 7 July 2018 With that, Clinton, who just had pacemaker surgery, announced his retirement from touring in 2019. Steve Krakow, Chicago Reader, "Before retiring from the road, George Clinton brings the funk to Chicago one more time," 5 July 2018 Later on, Savtchenko hopes this method can be used to build a better pacemaker. Angela Chen, The Verge, "How graphene and gold could help us test drugs and monitor cancer," 18 May 2018 For more than 90 of those, including pacemakers and combine harvester-threshers, China accounted for less than 0.1% of the value, according to Panjiva, which relied on U.S. Census Bureau data. Theo Francis, WSJ, "Proposed U.S. Tariffs on China Risk Penalizing Manufacturers Unevenly," 19 Apr. 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

10 Feb 2019

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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

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the range of authority or knowledge

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