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

A hiss and puff of compressed air shapes the smooth leather, bringing to life an all-American cowboy boot in a factory on China's eastern coast.

From BBC • Jan. 31, 2025

"Another factor that comes into play is that we are powering this robot with compressed air," Qing says.

From Science Daily • Dec. 4, 2024

A professional will inspect your ducts, assess debris levels, access the entire duct system, and use tools like brushes, compressed air and vacuuming to remove accumulated dirt, dust and debris.

From Seattle Times • Feb. 26, 2024

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