adjective
- not having air pressure maintained at a level suitable for breathing at high altitudes
Usage: aviation; aerospace
Examples
- The unpressurized cargo hold cannot carry live animals on long flights.
- Early aircraft were unpressurized, limiting their maximum altitude.
- The spacecraft’s unpressurized compartment stored equipment and supplies.
- Pilots must wear oxygen masks when flying unpressurized aircraft above 10,000 feet.
- The unpressurized cabin made breathing difficult at cruising altitude.
- Military transport planes often have unpressurized cargo areas.