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compressed air

American

noun

air compressed, especially by mechanical means, to a pressure higher than the surrounding atmospheric pressure.

compressed air British

noun

air at a higher pressure than atmospheric pressure: used esp as a source of power for machines

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of compressed air

First recorded in 1660–70

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Vanguard also will include a floating structure on the surface of the water to transport compressed air, power the vessel, and allow for communication with the outside world.

From Barron's • Oct. 29, 2025

Don’t use a hair dryer or compressed air on your phone.

From Seattle Times • Feb. 29, 2024

Then came the Windkessel, a chamber in the bottom of a wooden wagon that compressed air to pump water continuously through a hose, creating a steady stream.

From Science Daily • Jan. 23, 2024

The compressed air starts to glow, and when it reaches a temperature of about 2,000 degrees Celsius, the solid material in the meteoroid starts to vaporize.

From Scientific American • Sep. 8, 2023

After being compressed, air would spring back, given an opportunity.

From "The Scientists" by John Gribbin

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023