pressure in excess of normal atmospheric pressure, as that caused by an explosion's shock wave or created in an accelerating airplane.
verb (used with object), overpressured, overpressuring.
to cause or expose to overpressure.
to make undue demands on by a regimen, work load, etc.: students overpressured with heavy academic schedules.

1635–45; over- + pressure

overpressurization, noun
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World English Dictionary
overpressure (ˈəʊvəˌprɛʃə)
the blast effect of a nuclear weapon expressed as an amount of pressure greater than normal barometric pressure

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The amount by which the pressure produced by this wave exceeds normal atmospheric pressure is know as overpressure.
In unconfined areas, the flame speed remains low, and little physical damage from large overpressure is possible.
The motor shall have a load-sensing control which shall sense high torques caused by either jams or overpressure.
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