Campaign

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

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.