Police have launched a campaign to crack down on drug dealers. 2 a series of battles, attacks etc intended to achieve a particular result in a war COLLOCATIONS verbs launch/mount a campaign (=begin a campaign) They have launched a campaign to end world poverty. run/wage/conduct a campaign (=carry out a campaign) He ran an aggressive campaign. lead a campaign The government is leading a ‘walk to school’ campaign. spearhead a campaign (=lead it – used especially in news reports) The campaign was spearheaded by the Students’ Union.