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English definition of “life-saver”

life-saver

noun [C] uk   /ˈlaɪfˌseɪ.vər/ us    /-vɚ/

life-saver noun [C] (HELP)

someone or something that gives you a lot of help when you are in a very difficult situation: When you're stuck in traffic, a mobile phone's an absolute life-saver.Helpers and accomplicesPeople who help or serve people professionally

life-saver noun [C] (WATER)

Australian English 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 dangerPreserving and savingDefending and protectingEmergency services in general
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(Definition of life-saver from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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