Pertaining to, or of the nature of, explosion. Any substance by the decomposition of which gas is generated with such great rapidity that an internal pressure is suddenly set up, producing the effect of tremendous impact, and the rupture of the restraining medium.
a compound or mixture susceptible (by heat, shock, friction or other impulse) to a rapid chemical reaction, decomposition or combustion with the rapid generation of heat and gases with a combined volume much larger than the original substance
The term "explosive" or "explosives" includes any chemical compound or mechanical mixture which, when subjected to heat, impact, friction, shock, detonation or other suitable initiation, undergoes a very rapid chemical change with the evolution of large volumes of highly heated gases which exert pressures in the surrounding medium. The term applies to materials that either detonate or deflagrate. Reference: DoD 4145.26-M
Explosives are classified as low or high according to the detonating velocity or speed at which they change from being a solid or liquid to gas and other pertinent characteristics such as their shattering effect (or brisance). An arbitrary figure of 3300 fps is used to distinguish between burning / deflagration (low explosive) and detonation (high explosive). A propellant is said to burn at less than the speed of sound (approximately 1100 fps). Within the UK the possession and use of any explosive is subject to having the necessary licence.
Any substance (TNT, etc.) that, through chemical reaction, detonates or violently changes to gas with accompanying heat and pressure. Smokeless powder, by comparison, deflagrates (burns relatively slowly) and depends on its confinement in a gunþs cartridge case and chamber for its potential as a propellant to be realized.
Any chemical compound or chemical mixture that, under the influence of heat, pressure, friction, or shock, undergoes a sudden chemical change (decomposition) with the liberation of energy in the form of heat and light and accompanied by a large volume of gas. See Explosion, Explosive Detection Device, Explosive Mitigation.
A sound produced by an explosive impulse of the breath; (Phonetics) one of consonants p, b, t, d, k, g, which are sounded with a sort of explosive power of voice. [See Guide to Pronunciation, * 155-7, 184.]