A
jumper (in
American English),
pinafore dress or
pinafore (
British English) is a sleeveless, collarless
dress intended to be worn over a
blouse,
shirt or
sweater. In British English, the term
jumper describes what is called a
sweater in American English. Also, in more formal British usage, a distinction is made between a pinafore dress and a
pinafore. The latter, though a related garment, has an open back and is worn as an apron. In American English,
pinafore always refers to an apron.