改天 Traditional form: 改天 Pinyin (reading): gǎitiān Definitions: another day some other time to find another day (for appointment etc) to take a rain check Characters: 改 - to alter, to change, to improve, to remodel 天 - sky, heaven; god, celestial Traditional characters: 改 - to alter, to change, to improve, to remodel 天 - sky, heaven; god, celestial