the act of detonating.
an explosion.
Machinery. 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.

1670–80; < Medieval Latin dētonātiōn- (stem of dētonātiō), equivalent to Latin dētonāt(us) (see detonate) + -iōn- -ion

detonative, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
detonation (ˌdɛtəˈneɪʃən)
1.  an explosion or the act of exploding
2.  the spontaneous combustion in an internal-combustion engine of part of the mixture before it has been reached by the flame front, causing the engine to knock
3.  physics rapid combustion, esp that occurring within a shock wave

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1670s, "explosion accompanied by loud sound," from Fr. détonation, from M.L. detonationem, from L. detonare "to release one's thunder, roar out," from de- "down" + tonare "to thunder" (see thunder). Sense of "act of causing to explode" (mid-18c.) developed in French.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The explosion and plume of white that rose last night may have been the result
  of hydrogen deflagration and detonation.
Typically, the areas closest to the explosion or detonation receive the highest
  dose and downwind areas receive less.
The only source of light was that from the detonation.
Ordinarily, ski patrollers destroy hoar with direct detonation.
Image for detonation
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