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English definition of “lifeguard”

lifeguard

noun [C]     /ˈlaɪf.ɡɑːd/ US  /-ɡɑːrd/
a person on a beach or at a swimming pool whose job is to make certain that the swimmers are safe and save them if they are in danger Preserving and savingDefending and protectingEmergency services in general
(Definition of lifeguard noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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