Jumpsuit

[Marquetta]

A one-piece suit worn by parachutists for jumping.
A [garment] fashioned after this, usually combining a shirt or [bodice] with shorts or trousers [in one piece].

[Jason Yan]

A garment incorporating trousers and a sleeved top in one piece, worn as a fashion item, protective garment, or uniform.

[Kai]

a piece of clothing that covers both the upper body and the legs