CAMPAIN, n.
1. An open field; a large open plain; an extensive tract of ground without considerable hills. [See Champaign.]
2. The time that an army keeps the filed, either in action, marches, or in camp, without entering into winter quarters. A campaign is usually from spring to autumn or winter; but in some instances, armies make a winter campaign.
CAMPAIGN, v.i. To serve in a campaign.
