Definition of "Campaign" :

noun: an overland journey by hunters (especially in Africa)

noun: a series of actions advancing a principle or tending toward a particular end

"He supported populist campaigns."

noun: several related operations aimed at achieving a particular goal (usually within geographical and temporal constraints)

noun: a race between candidates for elective office

"I managed his campaign for governor."

verb: go on a campaign; go off to war

verb: run, stand, or compete for an office or a position

verb: exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person; be an advocate for