Definitions of Firewall on the Web:

• (colloquial) the application of maximum thrust; "he moved the throttle to the firewall"
• (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
• a fireproof (or fire-resistant) wall designed to prevent the spread of fire through a building or a vehicle
  wordnetweb.princeton.edu/perl/webwn

• Silk Fever is a villain in the Marvel Comics universe.
  en.wikipedia.org/wiki/Firewall_(comics)

• Firewall is a 2006 action/thriller film directed by Richard Loncraine and written by Joe Forte. Harrison Ford stars as Jack Stanfield, a security ...
  en.wikipedia.org/wiki/Firewall_(film)

• In construction, a firewall is a fire-resistance rated wall assembly intended to slow the spread of fire from one side to the other, and are certification listed. Firewalls subdivide a building into separate fire areas, and are located in accordance with the locally applicable building code. ...
  en.wikipedia.org/wiki/Firewall_(construction)

• A firewall is a part of a computer system or network that is designed to block unauthorized access while permitting outward communication. ...
  en.wikipedia.org/wiki/Firewall

• Firewall is a crime novel by Swedish author Henning Mankell.
  en.wikipedia.org/wiki/Firewall_(Henning_Mankell_novel)

• Firewall is a novel written by the ex-SAS member turned author Andy McNab. Released in 2000 it is the third book written about the fictional ...
  en.wikipedia.org/wiki/Firewall_(Andy_McNab_novel)

• Any of a number of security schemes that prevent unauthorised users from gaining access to a computer network or that monitors transfers of ...
  https://www.fnb.co.za/legallinks/securitycentre/terms.html

• A computer with special software that functions as a security barrier for an internal network. It separates computers in a local area network (LAN) from computers outside the network (eg Internet users). ...
  www.envision.ca/templates/resources.asp

• Legal barriers that prevent both the transference of inside information and the performance of financial transactions between commercial and investment banks.
  investors.divx.com/glossary.cfm

• A method of protecting the files and programs on one network from users on another network. A firewall blocks unwanted access to a protected network, while giving the protected network access to networks outside of the firewall.
  wwwlb.aub.edu.lb/~acc/Resources/glossarycommonterms.htm

• Firewalls can limit and stop access to computers by unauthorised people or systems. A personal firewall can be installed on your computer to ...
  www.netalert.gov.au/advice/publications/guides/a_teachers_guide_to_internet_safety/glossary.html

• A firewall is a piece of hardware or software program which protects a computer or network from attacks from intruders and hackers.
  www.cliftonpark.org/contentredirect.asp