Frost"y (?), a. [Cf. AS. fyrstig.]
Attended with, or producing, frost; having power to congeal water; cold; freezing; as, a frosty night.
Covered with frost; as, the grass is frosty.
Chill in affection; without warmth of affection or courage.
Appearing as if covered with hoarfrost; white; gray-haired; as, a frosty head.
© Webster 1913.