Definitions
1.AdjectiveReferring to the collar of pullover garments and usually of sweaters and T-shirts, when [the collar] circles the neck.
2.AdjectiveReferring to a garment's collar whose front is meant to ride up onto the neck, sometimes to Adam's apple level.
3.NounA round neckline with a ribbed texture.
4.NounA shirt, sweater, or similar garment with such a neckline.