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English definition of “campaign”

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campaign

noun [C] uk   /kæmˈpeɪn/ us  
C1 a planned group of especially political, business, or military activities that are intended to achieve a particular aim: The protests were part of their campaign against the proposed building development in the area. This is the latest act of terrorism in a long-standing and bloody campaign of violence. The endless public appearances are an inevitable part of an election campaign. She's the campaign organizer for the Labour Party. The government have just launched (= begun) their annual Christmas campaign to stop drunken driving. a controversial new advertising campaignC1 a group of connected actions or movements that forms part of a war: a bombing campaign
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campaign

verb [I] uk   /kæmˈpeɪn/ us  
C1 to organize a series of activities to try to achieve something: [+ to infinitive] They've been campaigning for years to get him out of prison. He's spending a lot of his time at the moment campaigning for/on behalf of the Conservative Party. They're busy campaigning against the building of a new motorway near here.
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(Definition of campaign from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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