(1):
(n.) Political operations preceding an election; a canvass.
(2):
(n.) An open field; a large, open plain without considerable hills. SeeChampaign.
(3):
(v. i.) To serve in a campaign.
(4):
(n.) The period during which a blast furnace is continuously in operation.
(5):
(n.) A connected series of military operations forming a distinct stage in a war; the time during which an army keeps the field.