Definition of campaign

• a race between candidates for elective office; "I managed his campaign for governor"; "he is raising money for a Senate run"
• a series of actions advancing a principle or tending toward a particular end; "he supported populist campaigns"; "they worked in the cause of world peace"; "the team was ready for a drive toward the pennant"; "the movement to end slavery"; "contributed to the war effort"
• several related operations aimed at achieving a particular goal (usually within geographical and temporal constraints)