(architecture) A fireproof barrier used to prevent the spread of fire between or through buildings, structures, electrical substation transformers, or within an aircraft or vehicle.

(transitive, computer security) To protect with a firewall. / (transitive, computer security) To block with a firewall.

plural of firewall

present participle of firewall

simple past tense and past participle of firewall

Ellipsis of Great Firewall of China.

plural of Chinese firewall

Alternative form of Chinese Wall (“information barrier within an organization”).

(originally humorous, derogatory) Government censorship of the Internet in the People's Republic of China.