Longman Dictionary of Contemporary English - campaign

~1 n 1 a series of actions intended to achieve a particular result, especially in politics or business + for  (a campaign for equal rights) + agains  (educational campaigns against smoking | an advertising campaign) 2 a series of battles, attacks etc intended to achieve a particular result in a war ~2 v to lead or take part in a series of actions intended to achieve a particular result + for/agains  (a group campaigning against the destruction of the rainforests) - campaigner n