overpressure

noun

1. (countable, uncountable)excess or markedly elevated pressure, especially a transient high pressure due to a shock wave

   “... or whether the bronchiectatic cavity is due principally to a yielding of the bronchial walls to the inspiratory and expiratory pressure, to the overpressure of the engorging secretion, ...”

   “The walls facing the explosion will experience a reflected overpressure.”

   “Figure 5-19 shows a breather valve that carries separately a direct-loaded vacuum relief value and an overpressure relief valve.”

verb

1. To subject to a high pressure