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English definition of “life-saver”

life-saver

noun [C] (HELP)    /ˈlaɪfˌseɪ.vər/ US  /-vɚ/
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
(Definition of life-saver noun (HELP) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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