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1. in an internal-combustion engine
a. an explosion of unburnt gases in the exhaust system
b. a premature explosion in a cylinder or inlet manifold
2. a controlled fire started to create a barren area that will halt an advancing forest or prairie fire
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A fire that is started in order to burn against and cut off a spreading fire.
Momentary backward burning of flame into the tip of a torch. Also known as flashback.
In an internal combustion engine, an improperly timed explosion of the fuel mixture in a cylinder, especially one occurring during the period that the exhaust or intake valve is open and resulting in a loud detonation.
Rearward escapement of gases or cartridge fragments upon firing a gun.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.