命在旦夕 mìngzàidànxī to be at death's door Origin Definitions Defs Strokes Stroke Words Sentences Sents 命 mìng noun life The state of being alive; the physical life of a person or animal在 zài preposition to be at To be located at, in, or on; to be present or at home.旦夕 dànxī short while a very short period of time