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- (chemistry) An explosion or sudden report made by the near-instantaneous decomposition or combustion of unstable substances. Specifically, combustion that spreads supersonically via shock compression.
- the detonation of gun cotton
- (mechanical engineering) Engine knocking, a type of improper combustion in gasoline piston engines.
The use of detonation to refer to engine knocking is mostly confined to aircraft engines.
- (with respect to speed of propagation): deflagration
Declension of detonation