泄洪 xièhóng to discharge floodwater Origin Definitions Defs Strokes Stroke Words Sentences Sents 泄洪道 xièhóngdào spillway A channel, sluice, or passage used for discharging surplus flood water; floodway泄洪闸 xièhóngzhá sluice gate A gate or valve used to release excess water from a reservoir, dam, or irrigation canal; also refers to the overall structures used for flood discharge.