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Definition of detonation : An explosion or sudden report made by the instantaneous decomposition or combustion of unstable substances' as, the detonation of gun cotton.

Synonyms:

effusion, burst, outburst, gush, explosion, plosion, blowout, blast, ebullition, enlargement, discharge, fulmination, blowup, magnification, firing

Usage examples:

• Then, like the grating of a coffee mill in a distant kitchen when one is just waking out of a sound sleep, they heard the faint, smothered whir of machinery, a sharper metallic ring of steel against steel followed by a gigantic detonation which shook the ground upon which the cottage stood and overthrew every glass upon the table. - "The Man Who Rocked the Earth", Arthur Train Robert Williams Wood.
• Bough Van Busch knew that in another moment the detonation would take place.... - "The Dop Doctor", Clotilde Inez Mary Graves.
• The crash of bombs, the peppery, sharp detonation of rifles broke up the sullen air. - "The Dark Tower", Phyllis Bottome.