Oxford Dictionary English sweatsuit noun noun BrE BrE//ˈswetsuːt// , also BrE//ˈswetsjuːt// ; NAmE NAmE//ˈswetsuːt// (informal sweats [plural]) (both North American English) Add to my wordlistjump to other results a sweatshirt and sweatpants worn together, for relaxing or playing sports inSee sweatsuit in the Oxford Advanced American DictionaryCheck pronunciation: sweatsuit oxfordlearnersdictionaries.com