長天 chángtiān vast sky Origin Definitions Defs Strokes Stroke Words Sentences Sents chángtiān vast sky 长 長 cháng adjective long long in space or time; lasting天 tiān noun sky sky; heavens; the space above the earthchángtiān whole day 长 長 cháng adjective long long in space or time; lasting天 tiān noun day a period of twenty-four hours; also used as a measurement for days or a specific time of day