champaign

Etymology

From Old French champaigne, from Late Latin campānia.

noun

1. (geography, archaic) Open countryside, or an area of open countryside.
   Where the Red Lion ſtaring o'er the way, / Invites each paſſing ſtranger that can pay; / Where Calvert’s butt, and Parſon’s black champaign, / Regale the drabs and bloods of Drury-lane; … a. 1775, Oliver Goldsmith, “A Description of an Author’s Bed-chamber”, in Poems and Plays.[…], London: Messrs. Price [et al.], published 1785, →OCLC, page 10
2. (obsolete) A battlefield.

adj

1. Pertaining to open countryside; unforested, flat.
   In England mobility was taken for granted, at least outside the champaign agricultural areas. 1972, Christopher Hill, The World Turned Upside Down, Folio Society, published 2016, page 35