Source : Webster's Revised Unabridged Dictionary (1913)

Champaign \Cham*paign"\, n. [OF. champaigne; same word as
   campagne.]
   A flat, open country.

         Fair champaign, with less rivers interveined. --Milton.

         Through Apline vale or champaign wide.   --Wordsworth.

Champaign \Cham*paign"\, a.
   Flat; open; level.

         A wide, champaign country, filled with herds.
                                                  --Addison.

Source : WordNet®

champaign
     n 1: extensive tract of level open land; "they emerged from the
          woods onto a vast open plain"; "he longed for the fields
          of his youth" [syn: {plain}, {field}]
     2: a university town in east central Illinois adjoining Urbana