fire wall

noun

Definition of fire wall

  1. 1 :  a wall constructed to prevent the spread of fire

  2. 2 usually firewallplay \ˈfī(-ə)r-ˌwȯl\ :  computer hardware or software that prevents unauthorized access to private data (as on a company's local area network or intranet) by outside computer users (as of the Internet)

First Known Use of fire wall

circa 1666


FIRE WALL Defined for English Language Learners

fire wall

noun

Definition of fire wall for English Language Learners

  • : a very thick wall that keeps fire from spreading

  • : a computer program or piece of equipment that keeps people from using or connecting to a computer or a computer network without permission

Learn More about fire wall


Seen and Heard

What made you want to look up fire wall? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

sad or melancholy

Get Word of the Day daily email!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!