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English definition of “hijack”

hijack

verb [T] uk   /ˈhaɪ.dʒæk/ us  
to take control of an aircraft or other vehicle during a journey, especially using violence: Two men hijacked a jet travelling to Paris and demanded $125,000. disapproving to take control of or use something that does not belong to you for your own advantage: He resents the way his ideas have been hijacked by others in the department.
hijacker
noun [C] uk   /r/ us    //

hijack

noun [C or U] uk   /ˈhaɪ.dʒæk/ (also hijacking) us  
an occasion when someone uses force to take control of an aircraft or other vehicle: The hijack ended with the release of all the plane's passengers unharmed.
(Definition of hijack from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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