WordNet (r) 3.0 (2006):

Marches
    n 1: a region in central Italy [syn: Marche, Marches]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

MARCHES, Eng. law. This word signifies the limits, or confines, or borders.
Bac. Law Tracts, tit. Jurisdiction of the. Marches, p. 246. It was applied
to the limits between England and Wales or Scotland. In Scotland the term
marches is applied to the boundaries between private properties.