champaign /ˈʃæmpeɪn/noun 2adjective 1forms 3 noun2 •(no longer used) Open countryside, or an area of open countryside.Of all these bounds euen from this Line, to this, / With shadowie Forrests, and with Champains rich'd / With plenteous Riuers, and wide-skirted Meades / We make thee Lady. — 1603 •(no longer used) A battlefield. adjective1 •Pertaining to open countryside; unforested, flat.They are seated alongst the sea-coast, encompassed toward the land with huge and steepie mountains, having betweene both, a hundred leagues or there abouts of open and champaine ground. — 1603 formschampaigns · more champaign · most champaign