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Definition of lifeblood noun from the Oxford Advanced American Dictionary

     

    lifeblood

     noun
    noun
    NAmE//ˈlaɪfblʌd//
     
    [uncountable]
     
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  1. 1lifeblood (of something) the thing that keeps something strong and healthy and is necessary for successful development Tourism is the lifeblood of the city.
  2. 2(literary) a person's blood, when it is thought of as the thing that is necessary for life The wound was draining the lifeblood from him.
See lifeblood in the Oxford Advanced Learner's Dictionary
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