life-support system Meaning in the Cambridge English Dictionary
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Meaning of “life-support system” in the English Dictionary

"life-support system" in British English

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life-support systemnoun [C]

uk   /ˈlaɪf.səˌpɔːtˌsɪs.təm/  us   /-ˌɔːrt-/
(also life support [U]) the ​equipment used to ​keep a ​personalive when they are very ​ill, or ​injured: He's been on a life-support ​system since the ​crash. the ​naturalstructures and ​systems that are ​necessary for ​living things, ​especiallyhumans, to be ​able to ​live: The ​lack of ​rain is ​threatening all the region's life-support ​systems (= the ​earth, ​trees and ​rivers).
(Definition of life-support system from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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