Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Family, Nationality & raceBr.Br. (also Br British English)1 SSFthe written abbreviation of brother2 SANthe written abbreviation of BritishRelated topics: Trains & railwaysBRBR /ˌbiː ˈɑː $ -ˈɑːr/ noun [singular] TTT → British Rail ldoceonline.com