1. a wall or partition designed to prevent the spread of fire
Usage: construction; safety
2. a security system that monitors and controls network traffic to prevent unauthorized access
Usage: computing; cybersecurity

Examples

• The building code requires a firewall between the garage and the house.
• The firewall prevented the flames from spreading to the adjacent building.
• Our company installed a new firewall to protect against cyber attacks.
• The firewall blocked the suspicious incoming connection.
• Make sure your computer’s firewall is enabled when browsing the internet.
• The IT department configured the firewall to allow only essential traffic.
• A properly maintained firewall is crucial for network security.