What is the meaning of campaign?

noun

• A race between candidates for elective office.
  • usage: "I managed his campaign for governor"; "he is raising money for a Senate run"
  • synonyms: political campaign, run
• A series of actions advancing a principle or tending toward a particular end.
  • usage: "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"
  • synonyms: cause, crusade, drive, movement, effort
• Several related operations aimed at achieving a particular goal (usually within geographical and temporal constraints.
  • synonyms: military campaign
• An overland journey by hunters (especially in Africa.
  • synonyms: hunting expedition, safari

verb

• Run, stand, or compete for an office or a position.
  • usage: "Who's running for treasurer this year"
  • synonyms: run
• 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.
  • usage: "The liberal party pushed for reforms"; "She is crusading for women's rights"; "The Dean is pushing for his favorite candidate"
  • synonyms: crusade, fight, press, push, agitate
• Go on a campaign; go off to war.
  • synonyms: take the field