adj covered with frost; as, the grass is frosty.
2. frosty ·adj chill in affection; without warmth of affection or courage.
3. frosty ·adj appearing as if covered with hoarfrost; white; gray-haired; as, a frosty head.
4. frosty ·adj attended with, or producing, frost; having power to congeal water; cold; freezing; as, a frosty night.