- a British island in the English Channel: the largest of the Channel Islands. 44 sq. mi. (116 sq. km). Capital: St. Helier.
- Informal. New Jersey.
- a knitted garment covering the upper part of the body
- a machine-knitted slightly elastic cloth of wool, silk, nylon, etc, used for clothing
- (as modifier)a jersey suit
- a football shirt
- an island in the English Channel, the largest of the Channel Islands: forms, with two other islands, the bailiwick of Jersey; colonized from Normandy in the 11th century and still officially French-speaking; noted for finance, market gardening, dairy farming, and tourism. Capital: St Helier. Pop: 95 732 (2013 est). Area: 116 sq km (45 sq miles)
- a breed of dairy cattle producing milk with a high butterfat content, originating from the island of Jersey
1580s as a type of knitted cloth; 1842 as a breed of cattle; both from Jersey, one of the Channel Islands. Its name is said to be a corruption of Latin Caesarea, the Roman name for the island (or another near it), influenced by Old English ey “island;” but perhaps rather a Viking name (perhaps meaning “Geirr’s island”). The meaning “woolen knitted close-fitting tunic,” especially one worn during sporting events, is from 1836.