\Cam*pa"gna\, n. [It. See {Campaing}.]
An open level tract of country; especially ``Campagna di
Roma.'' The extensive undulating plain which surrounds Rome.
Note: Its length is commonly stated to be about ninety miles,
      and its breadth from twenty-seven to forty miles. The
      ground is almost entirely volcanic, and vapors which
      arise from the district produce malaria.