Meaning & use
firewall
Last updated
Meanings
nouncountablecomputing
A computer system that controls incoming and outgoing network traffic to protect against unauthorized access.
Grammar: Can be used with 'a' or in the plural: 'a firewall', 'two firewalls'.
Patterns
- install a firewall
- configure a firewall
- behind a firewall
- firewall software
The company installed a new firewall to block hackers.
Make sure your firewall is turned on before you connect to public Wi-Fi.
The firewall prevented the virus from spreading.
nouncountabletechnical
A wall built to stop fire from spreading from one part of a building to another.
Grammar: Often used in the plural when referring to multiple walls.
Patterns
- build a firewall
- firewall between something
- firewall regulations
The building code requires a firewall between the garage and the house.
Firewalls in the attic can slow the spread of flames.
Word forms
| plural | firewalls |
|---|
Common combinations
- install a firewall
- You should install a firewall on your home network.
- firewall protection
- Firewall protection is essential for online security.
- behind a firewall
- The server is behind a firewall, so it's hard to access.
- firewall settings
- Check your firewall settings to allow the app.
Synonyms and how they differ
- security system
- A broader term that can include firewalls but also other protective measures.
Word family
- firewalling noun
- The act of using a firewall to protect a network.
Commonly confused: firewall or fire wall?
firewall vs fire wall
Written as two words, it usually refers to a physical wall against fire, not the computer system.
Practice
To protect your computer from hackers, you should ___ a firewall.
Choose one answer.
We 'install' software like a firewall. 'Build' is used for physical walls, 'make' is too general, and 'do' does not collocate with firewall.
Make it your own
Write a sentence using “firewall”, then check it and compare it with the examples above.