Oxford Dictionary English swimsuit noun noun BrE BrE//ˈswɪmsuːt// , also BrE//ˈswɪmsjuːt// ; NAmE NAmE//ˈswɪmsuːt// (British English also swimming costume) (also bathing suit North American English or old-fashioned) Swimming Add to my wordlistjump to other results a piece of clothing worn for swimming, especially the type worn by women and girls See related entries: SwimmingSee swimsuit in the Oxford Advanced American DictionaryCheck pronunciation: swimsuit oxfordlearnersdictionaries.com