Meaning & use
firewall
A system that monitors and controls network traffic to block unauthorized access to a computer or network.
See it in a sentence
The company's firewall blocked several attempts to access the internal server overnight.
She configured the office firewall to allow traffic only from trusted addresses.
A note on using this word
Originally a wall built to stop fires from spreading; the computing sense is now the dominant modern usage.
Words with a similar meaning
security barrier
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. noun
A wall built to prevent the spread of fire between parts of a building.
Building codes required a firewall between the garage and the living space.
Make it your own
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