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Word of the Day Wednesday, June 10, 2026

firewall

/ˈfaɪərˌwɔːl/ noun · British & US
Valid in UKValid in US
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What does firewall mean?

noun

A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firebreak that stops the spread of fire.

Example

"The company implemented a firewall to protect its network from hackers."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for firewall

Antonyms of firewall

Rhymes with firewall

Etymologically related