- jersey⇄jersey, noun, pl.-seys.
1. a knitted cloth of wool, cotton, rayon, nylon, or silk with a tight weave.
2. a woman's close-fitting, knitted undergarment.
3. a close-fitting sweater or shirt that is pulled on over the head. - Jersey⇄Jersey, noun, pl.-seys.
any one of a breed of small, fawn-colored cattle that came originally from the island of Jersey. Jerseys give very rich milk.