一言为定 yīyánwéidìng it's a deal Origin Definitions Defs Strokes Stroke Words Sentences Sents 一言 yīyán noun one word a single word, a brief remark, or one sentence为 為 wéi verbpreposition to be to be; to become; to act as; to serve as; to take as定 dìng verb to decide to fix; to set; to determine; to reach a decision