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overpressure

   Also found in: Medical, Wikipedia 0.09 sec.
o·ver·pres·sure  (vr-prshr)
n.
A transient air pressure, such as the shock wave from an explosion, that is greater than the surrounding atmospheric pressure.
tr.v. o·ver·pres·sured, o·ver·pres·sur·ing, o·ver·pres·sures
To cause or subject to overpressure.

over·pressur·i·zation (--zshn) n.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.overpressure - a transient air pressure greater than the surrounding atmospheric pressure; "the overpressure of the blast kills by lethal concussion"
air pressure, atmospheric pressure, pressure - the pressure exerted by the atmosphere

The pressure resulting from the blast wave of an explosion. It is referred to as "positive" when it exceeds atmospheric pressure and "negative" during the passage of the wave when resulting pressures are less than atmospheric pressure.

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