Definition of jumpsuit noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈdʒʌmpsuːt//
, also BrE//ˈdʒʌmpsjuːt//
; NAmE NAmE//ˈdʒʌmpsuːt//
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a piece of clothing that consists of trousers/pants and a jacket or shirt sewn together in one piece, worn especially by women Word Origin1940s (originally US): so named because it was first used to denote a parachutist's garment.
See the Oxford Advanced American Dictionary entry: jumpsuit