Dictionary![]() ![]() det•o•na•tionPronunciation: (det"n-ā'shun), [key] —n. 1. the act of detonating. 2. an explosion. 3. Mach.the premature spontaneous burning of a fuel–air mixture in an internal-combustion engine due to the high temperature of air compressed in a cylinder. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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