Campagna \Cam*pa"gna\ (c[.a]m*p[aum]"ny[.a]), n. [It. See
   Campaign.]
   An open level tract of country; especially "Campagna di
   Roma." The extensive undulating plain which surrounds Rome.
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   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.
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