- (aviation, astronautics) A sealed, full-body garment, usually with an attachable helmet, which maintains air pressure or mechanical pressure around the body of an astronaut or aviator to compensate for the low density of the air at high altitudes.
- 1964 Nov. 19, Walter Sullivan, "Apes Surviving in Vacuum Tests: Research Hints Astronauts Have Chance in Accidents," New York Times (retrieved 3 May 2014):
- The chances for survival would be greatly increased if one member of the crew in a punctured ship was wearing a pressure suit.
- 2002 July 29, Nigel Fountain, "Obituary: John Cunningham, Wartime night-fighter hero and post-war Comet airliner test pilot," The Guardian (UK) (retrieved 3 May 2014):
- In 1947 he had taken a de Havilland Vampire jet fighter to a then world record height of 59,460 feet, without a pressure suit,
- 2011 April 12, Jeffrey Kluger, "Gagarin's Golden Anniversary," Time (retrieved 3 May 2014):
- Alan Shepard, the first American in space, famously relieved himself inside his silver pressure suit while waiting out the countdown in his tiny Mercury capsule.
- (suit to protect wearer from the environment): diving suit, environmental suit
- (aviator garment): flight suit
full-body garment, which maintains pressure