(1):
(n.) A kind of knitted jacket; hence, in general, a closefitting jacket or upper garment made of an elastic fabric (as stockinet).
(2):
(n.) The finest of wool separated from the rest; combed wool; also, fine yarn of wool.
(3):
(n.) One of a breed of cattle in the Island of Jersey. Jerseys are noted for the richness of their milk.