拦洪坝 lánhóngbà flood-regulating dam Origin Definitions Defs Strokes Stroke Words Sentences Sents 拦洪 攔洪 lánhóng to hold back a flood To block or store floodwater; to intercept floodwater using a dam or dike.坝 壩 bà noun dam a structure built across a river or valley to impound water