frosty adj.
1 cold enough for frost
VERBS be, look | become, get, turn when the weather turns frosty | remain, stay
ADV. very
PHRASES cold and frosty The day dawned cold and frosty.
2 unfriendly
VERBS be, look, seem | become, turn He cool green eyes became positively frosty. | remain
ADV. decidedly, distinctly, positively, very The atmosphere in the room was decidedly frosty. | pretty
You can also check other dicts: frosty (English, 中文解释 ), wordnet sense, Collins Definition