天字第一号 tiānzìdìyīhào number one Origin Definitions Defs Strokes Stroke Words Sentences Sents 天 tiān noun sky sky; heavens; the space above the earth字 zì noun character written character; symbol; script; word第一 dìyī numeral first occupying the lead position in a sequence, order, or ranking; the first号 號 hào noun number number in a series; ordinal number; day of the month