A firewall is a computer system or program that automatically prevents an unauthorized person from gaining access to a computer when it is connected to a network such as the internet.
[computing]
New technology should provide a secure firewall against hackers.
firewall in British English
noun
1.
a fireproof wall or partition used to impede the progress of a fire, as from one room or compartment to another
2. computing
a computer system that isolates another computer from the internet in order to prevent unauthorized access
firewall in Automotive Engineering
(faɪərwɔl)
Word forms: (regular plural) firewalls
noun
(Automotive engineering: Vehicle components, Bodywork, controls, and accessories)
A firewall is a panel between the engine compartment and the passenger compartment in a vehicle that is intended to prevent the spread of fire from the engine.
The fumes probably entered his car's cockpit through the firewall, which separates the cockpit from the engine.
In case of a fire, the firewall protects the passengers in the car by not permitting an engine fire to enter thepassenger cabin.
In a car, the firewall is placed between the car's engine and the passenger seats so that the people insidethe car will be protected if there is a fire in the engine.
Examples of 'firewall' in a sentence
firewall
Is it hoping to build a reputational firewall between the bank and its majority owner?
Times, Sunday Times (2014)
In addition, make sure a software firewall has been installed on the laptop and is active.
Times, Sunday Times (2012)
In other languages
firewall
British English: firewall /ˈfaɪəˌwɔːl/ NOUN
A firewall is a computer system or program that automatically prevents an unauthorized person from gaining access to a computer when it is connected to a network such as the Internet.
New technology should provide a secure firewall against hackers.