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lifeline

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lifeline/ˈlaɪfˌlaɪn/noun
plurallifelines
lifeline
/ˈlaɪfˌlaɪn/
noun
plurallifelines
Learner's definition of LIFELINE  
[count]
: something which provides help or support that is needed for success or survival
: a rope used for saving the life of someone (such as someone who has fallen into water)
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