Jersey \Jer"sey\, n.; pl. {Jerseys}. [From Jersey, the largest of the Channel Islands.] 1. The finest of wool separated from the rest; combed wool; also, fine yarn of wool. 2. A kind of knitted jacket; hence, in general, a closefitting jacket or upper garment made of an elastic fabric (as stockinet). 3. One of a breed of cattle in the Island of Jersey. Jerseys are noted for the richness of their milk.