开红灯 kāihóngdēng to give the red light Definitions Defs Origin Strokes Stroke Words Sentences Sents kāihóngdēng to give the red light 开 開 kāi verb to start to begin; to start; to set in motion; to initiate (an action, term, or schedule)红灯 紅燈 hóngdēng warning sign a signal of danger or a warning that a situation has reached a critical pointkāihóngdēng to fail a test 开 開 kāi verb to start to begin; to start; to set in motion; to initiate (an action, term, or schedule)红灯 紅燈 hóngdēng noun red light a red lamp or lantern; specifically a red traffic signal indicating that vehicles and pedestrians must stop