火墙 huǒqiáng heated wall Origin Definitions Defs Strokes Stroke Words Sentences Sents 防火墙 fánghuǒqiáng firewall (architecture) a wall built with fireproof materials between buildings to prevent the spread of fire风火墙 fēnghuǒqiáng firewall A wall built with non-combustible materials to prevent the spread of fire; commonly the outer wall of a building.