0 present participle of depressurize
1 to (cause a closed space, especially the inside of an aircraft to) become lower in air pressure:
If the cabin depressurizes, oxygen masks will automatically drop down.
The plugs are also too small in area to lower steam pressure significantly, depressurizing the boiler.
A duct leakage test can be performed by either pressurizing or depressurizing the ductwork.
After suit checks and depressurizing the spacecraft, the hatch was opened.
Different values for blower door metrics are to be expected for pressurizing and depressurizing, due to the building envelope's response to directional airflow.
If, on the other hand, the cabin was not depressurized or only slowly depressurizing, the astronauts may have been conscious for the entire fall until impact.
