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English definition of “pacemaker”

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pacemaker

noun [C] uk   /ˈpeɪsˌmeɪ.kər/ us    /-kɚ/

pacemaker noun [C] (RUNNER)

( also pacesetter,   /-ˌset.ər/    /-ˌset̬.ɚ/) the person or animal that establishes the speed in a race, or a person or organization that is an example for others by being successful

pacemaker noun [C] (DEVICE)

a small device that is put inside someone's chest in order to help the heart beat at the correct speed
(Definition of pacemaker from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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