Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Clothessou'westersou'west‧er /saʊˈwestə $ -ər/ noun [countable] DCCa hat made of shiny material that keeps the rain off, with a wide piece at the back that covers your neckOrigin sou'wester (1800-1900) southwester ldoceonline.com