From The Collaborative International Dictionary of English v.0.48 [gcide]: Jersey \Jer"sey\, n.; pl. Jerseys. [From Jersey, the largest of the Channel Islands.] [1913 Webster] 1. The finest of wool separated from the rest; combed wool; also, fine yarn of wool. [1913 Webster] 2. A kind of knitted jacket; hence, in general, a closefitting jacket or upper garment made of an elastic fabric (as stockinet). [1913 Webster] 3. One of a breed of cattle in the Island of Jersey. Jerseys are noted for the richness of their milk. [1913 Webster]