n. pl. jer·seys 1. A soft, plain-knitted fabric used for clothing.
2. a. A shirt worn by an athlete, often displaying the name of the player, team, or sponsor.
b. A close-fitting knitted pullover shirt, jacket, or sweater.
3. often Jersey Any of a breed of fawn-colored dairy cattle developed on the island of Jersey and producing milk that is rich in butterfat.