(1):

(a.) Attended with, or producing, frost; having power to congeal water; cold; freezing; as, a frosty night.

(2):

(a.) Covered with frost; as, the grass is frosty.

(3):

(a.) Chill in affection; without warmth of affection or courage.

(4):

(a.) Appearing as if covered with hoarfrost; white; gray-haired; as, a frosty head.