firewall
//ˈfaɪərˌwɔːl//
Noun
firewallSingular
firewallsPlural
1
A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
The company installed a firewall to protect its network from hackers.
2
A fire-resistant barrier used to prevent the spread of fire between or through buildings, vehicles, or other structures.
The firewall between the two apartments prevented the fire from spreading.
Verb
1
To protect a computer or network by installing or configuring a firewall.
You should firewall your home network to prevent unauthorized access.
2
To isolate or separate something to prevent unwanted access or influence.
The company decided to firewall its financial data from other departments.