From Longman Dictionary of Contemporary Englishroommateroom‧mate, room-mate /ˈruːmˌmeɪt, ˈrʊm-/ ●●○ noun [countable] 1 LIVE WITH somebodysomeone who you share a room with, especially at college one of my college roommates2 American EnglishLIVE WITH somebody someone you share an apartment or house with SYN flatmate British English
Examples from the Corpus
roommate• They became roommates, not lovers.• I ran into my old college roommate today.• I shared a taxicab with the Stephens College student and her roommate, who had come to meet her at the airport.• He and his co-Web site founders, who are also his roommates, will graduate in May.• Charity Chin, my roommate, is sitting on the floor drinking Chablis out of a plastic wineglass.• I came out to my roommate.• I had just moved in late December, fleeing a nightmare roommate situation in the Village.• We were roommates back in Chicago. 