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 pacemaker (audio) \ noun

Synonyms & Antonyms for pacemaker



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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 The 81-year-old is high risk, living with a pacemaker, lung disorder and double-cancer history. Mary Bergin, Milwaukee Journal Sentinel, "Here's how Milwaukee-area faith leaders view Easter dining, in a year and season of rebirth," 31 Mar. 2021 Those with a pacemaker and people undergoing chemotherapy, among others, are not scanned, Galbraith said. James Whitlow,, "Body scanner, paid for with federal CARES Act funds, helps keep drugs, contraband out of Harford County jail," 19 Mar. 2021 The medical examiner later blamed her heart disease, saying her pacemaker failed. Special To The Oregonian/oregonlive, oregonlive, "Did James Fuller Plymell III need to die?," 3 Mar. 2021 Stacy had suffered from heart problems and had a pacemaker. Peter Van Sant, CBS News, "S.C. nurse who fatally poisoned husband with eye drops: "I just wanted him to suffer"," 13 Mar. 2021 New York Yankees manager Aaron Boone took a leave of absence from the team to get a pacemaker and intends to return to work in a few days. Creg Stephenson |, al, "Cubs-Dodgers MLB 2021 spring training live stream (3/4): How to watch online, TV info, time," 5 Mar. 2021 While the heart checkup came back normal, there were indications of a low heart rate which, after further consultations with doctors in Tampa, necessitates a pacemaker. Kristie Ackert,, "Aaron Boone to receive pacemaker, expects to return to Yankees within days," 3 Mar. 2021 The New York Yankees announced Wednesday that manager Aaron Boone is taking an immediate medical leave of absence to receive a pacemaker. Dave Clark, The Enquirer, "New York Yankees manager Aaron Boone takes medical leave of absence to receive pacemaker," 3 Mar. 2021 At Maimonides hospital, in Brooklyn, Adrian Kantrowitz, a surgeon-inventor who had helped perfect the pacemaker and the heart-lung machine, began working on pump designs. Joshua Rothman, The New Yorker, "How to Build an Artificial Heart," 1 Mar. 2021

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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Time Traveler for pacemaker

Time Traveler

The first known use of pacemaker was in 1884

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Statistics for pacemaker

Last Updated

9 Apr 2021

Cite this Entry

“Pacemaker.” Dictionary, Merriam-Webster, Accessed 14 Apr. 2021.

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More Definitions for pacemaker



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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