[1] : WordNet (r) 2.0

firewall
     n 1: the application of maximum thrust; "he slammed the throttle
          to the firewall"
     2: computing a security system consisting of a combination of
        hardware and software that limits the exposure of a
        computer or computer network to attack from crackers;
        commonly used on local area networks that are connected to
        the internet
     3: fireproof or fire-resistant wall designed to prevent the
        spread of fire through a building or a vehicle

[2] : The Free On-line Dictionary of Computing (27 SEP 03)

firewall
     
        1. firewall code.
     
        2. firewall machine.
     
     
see also:
firewall code firewall machine 

Firewall >> F Words
Firewall, definition of term: Firewall
firewall_pag1.html

Firewall Machin >> F Words
Firewall Machin, definition of term: Firewall Machin
firewall+machin_pag1.html

Firewall Code >> F Words
Firewall Code, definition of term: Firewall Code
firewall+code_pag1.html