Definition from macmillandictionary.com
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a literacy/recruitment/anti-drug campaign
Local people have launched a campaign against the hospital’s closure.
There’s been a campaign by local fishermen to ban imported cod.
It is alleged that the party used illegal methods to finance its campaign.
an election/leadership/re-election campaign
The campaign boosted sales of the jeans by 200%.
an advertising/publicity/marketing campaign
This victory was the turning point of the campaign.
There are some questions you get asked more than others on the campaign trail.