n. & v.
n. hist. 1 (usu. in pl.) a boundary, a frontier (esp. of the borderland between England and Scotland or Wales). 2 a tract of often disputed land between two countries.
v.intr. (foll. by upon, with) (of a country, an estate, etc.) have a common frontier with, border on.
[ ME f. OF marche, marchir ult. f. Gmc: cf. MARK(1) ]