firewall

Software that checks connections to a computer or network and blocks ones that might be unsafe.

• Check your firewall settings.
• The firewall blocked an unknown connection.
• Our office computers sit behind a firewall.

Common phrases: install a firewall, firewall settings, behind a firewall

A wall or barrier that stops fire from spreading from one area to another.

• A firewall separates the two buildings.
• The flames did not pass through the firewall.
• Mechanics inspected the firewall between the engine and the passenger compartment.

Similar words: fire wall, fire barrier

Common phrases: concrete firewall, engine firewall, build a firewall

To protect a computer or network by checking and blocking unsafe connections.

• You should firewall the server.
• The administrator firewalled every office computer.
• Have you firewalled the network against outside connections?

How to use it: firewall something against something (We firewalled the network against unauthorized access.)

Common phrases: firewall a server, firewall the network, firewall a computer

To limit contact with someone so they cannot control, pressure, or emotionally hurt you.

• She decided to firewall her ex.
• He firewalled his controlling father by limiting their calls.
• After repeated threats, she firewalled the relative who kept contacting her.

Similar words: distance oneself from, limit contact with

Common phrases: firewall someone, firewall a relative, firewall an ex