OVERPRESSURE
overpressure
(noun) a transient air pressure greater than the surrounding atmospheric pressure; “the overpressure of the blast kills by lethal concussion”
Source: WordNet® 3.1
Etymology
Noun
overpressure (countable and uncountable, plural overpressures)
excess or markedly elevated pressure, especially a transient high pressure due to a shock wave
Verb
overpressure (third-person singular simple present overpressures, present participle overpressuring, simple past and past participle overpressured)
To subject to a high pressure
Antonyms
• underpressure
Source: Wiktionary
O"ver*pres"sure, n.
Definition: Excessive pressure or urging. London Athenæum.
Source: Webster’s Unabridged Dictionary 1913 Edition