A program that defends your computer from malicious users accessing and using your computer either as a port to someone elses computer or to totally mess up yours :)
My firewall kicked that hackers ass last night
by Urban-k September 2, 2003
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1. a progam that protects a computer from malware and other forms of outside intrusion

2. any protective barrier between two places
My firewall needs to be updated.
by Light Joker August 27, 2007
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Section of aircraft especially designed to allow all engine heat and smoke to fill the cockpit.
Good thing my cessna 172 has a firewall....oh crap! the engine is on fire!
by IrishRepublicanArmy December 22, 2003
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The best tool to prevent windows from accessing the activation server and disabling your version. Also it prevents windows from using your bandwidth to download useless "updates".
The firewall totally stonewalls the windows activation processes !
by chemical_processes May 24, 2010
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A geek's condom; Helps prevent viruses
Remember to practice safe hex and use a firewall!
by Daniel March 25, 2005
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Any of a number of security schemes that prevent unauthorized users from gaining access to a computer network or that monitor transfers of information to and from the network.
My Firewall pwns your face.
by Deceptik0n July 12, 2005
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When a man with red hair spreads his excess scrotum skin over the face of a woman.
"Chris, I want you to strap me down and firewall me"

"AHHH, You're suffocating me with your firewall!"
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