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English definition of “lifeboat”

lifeboat

noun [C]  /ˈlɑɪfˌboʊt/ us  
a large boat that is kept ready to take out to sea and save people who are in danger, or a smaller boat kept on a ship for people to leave in if the ship is not safe or might sink
(Definition of lifeboat from the Cambridge Academic Content Dictionary © Cambridge University Press)
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