a young male horse, especially one less than 4 years old （四或五岁以下的）雄马驹 - (British English)
a member of a sports team consisting of young players （年轻运动队的）队员 - Colt™
a type of small gun 科耳特左轮手枪
Word OriginOld English; perhaps related to Swedish kult, applied to boys or half-grown animals.