Meaning of campaign

cam•paign

1. military operations for a specific objective.
2. Obs.the military operations of an army in the field for one season.
2. a systematic course of aggressive activities for some specific purpose: a sales campaign.
3. the competition by rival political candidates and organizations for public office.

1. to serve in or go on a campaign: He planned to campaign for the candidate. He campaigned in France.

1. to race (a horse, boat, car, etc.) in a number or series of competitions.