WordNet sense 1 (the month following February and preceding April):

mar

WordNet sense 2 (district consisting of the area on either side of a border or boundary of a country or an area):

borderland, marchland, border district

WordNet sense 3 (genre of music written for marching):

marching music

WordNet sense 4 (a degree granted for the successful completion of advanced study of architecture):

Master of Architecture

WordNet sense 5 (march in protest; take part in a demonstration):

demonstrate

WordNet sense 6 (march in a procession):

process, process

WordNet sense 7 (walk ostentatiously):

exhibit, parade

WordNet sense 8 (lie adjacent to another or share a boundary):

abut, adjoin, border, edge, butt against

WordNet sense 9 (the act of marching; walking with regular steps (especially in a procession of some kind)):

marching