Definitions for backdraftˈbækˌdræft, -ˌdrɑft
Random House Webster's College Dictionary
an explosive surge in a fire occurring when air is suddenly mixed with a combustible gas.
Category: Common Vocabulary, Physics
Origin of backdraft:
An extreme fire behavior phenomena involving ignition of products of combustion (such as carbon monoxide) and pyrolysis products upon introduction of oxygen to a compartment. In this phenomena the fuel generally is at a high temperature (above 600 degrees C), but combustion is limited by a lack of oxygen. Introduction of atmospheric oxygen results in explosive combustion.