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say it: FAHYR-wahl
firewall is a noun meaning "(colloquial) the application of maximum thrust". It carries 3 recorded senses.
(colloquial) the application of maximum thrust
“he moved the throttle to the firewall”
colloquialism
(computing) a security system consisting of a combination of hardware and software that limits the exposure of a computer or computer network to attack from crackers; commonly used on local area networks that are connected to the internet
computer science
a fireproof (or fire-resistant) wall designed to prevent the spread of fire through a building or a vehicle
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for firewall come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.