blowback

blow·back  (blbk)

n.

1. The backpressure in an internal-combustion engine or a boiler.

2. Powder residue that is released upon automatic ejection of a spent cartridge or shell from a firearm.

3. The effect caused by recirculation into the source country of disinformation previously planted abroad by that country's intelligence service in an effort to mislead the government of another country.

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blowback [ˈbləʊˌbæk]

n

1. (Engineering / General Engineering) the escape to the rear of gases formed during the firing of a weapon or in a boiler, internal-combustion engine, etc

2. (Military) the action of a light automatic weapon in which the expanding gases of the propellant force back the bolt, thus reloading the weapon

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1. Escape, to the rear and under pressure, of gases formed during the firing of the weapon. Blowback may be caused by a defective breech mechanism, a ruptured cartridge case, or a faulty primer.
2. Type of weapon operation in which the force of expanding gases acting to the rear against the face of the bolt furnishes all the energy required to initiate the complete cycle of operation. A weapon which employs this method of operation is characterized by the absence of any breech-lock or bolt-lock mechanism.

Thesaurus

Noun	1.	blowback - the backward escape of gases and unburned gunpowder after a gun is fired backfire blowup, detonation, explosion - a violent release of energy caused by a chemical or nuclear reaction back-blast, backblast - backfire from a recoilless weapon
	2.	blowback - misinformation resulting from the recirculation into the source country of disinformation previously planted abroad by that country's intelligence service misinformation - information that is incorrect