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English definition of “pacemaker”

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 successfulCompetitors and participants in sports and gamesDescribing the leading position

pacemaker noun [C] (DEVICE)

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