pace·mak·er | \ˈpās-ˌmā-kər \

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 \ 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

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 My father’s heart didn’t recover for long, battered by the eventual installation of a pacemaker, then by heart blockages and lung cancer. Mayukh Sen, Bon Appetit, "In Search of Fatima Lakhani, Whose Cookbook Changed the Way My Family Ate," 27 June 2018 There's the Swedish hospital where, in 1958, Rune Elmqvist implanted the first pacemaker, and the South African operating room where Christiaan Barnard performed the first successful human-to-human heart transplant. Erin Blakemore, Washington Post, "Pioneering heart surgery explored through 11 historic operations," 6 Mar. 2018 Three days later, doctors removed part of his bowel to relieve an intestinal blockage and installed a pacemaker, Flair said. Joe Marusak, charlotteobserver, "After an earlier life-saving operation, Ric Flair undergoes another surgery," 9 July 2018 This greatly simplifies battery-replacement surgery and could reduce complications associated with conventional pacemakers. Leslie Nemo, Scientific American, "New Wireless Pacemaker Could Prevent Common Complications," 1 Sep. 2017

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

8 Sep 2018

Look-up Popularity

Time Traveler for pacemaker

The first known use of pacemaker was in 1884

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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 \

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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Comments on pacemaker

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not any or not one

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