- an apparatus for drawing in, compressing, or exhausting air.
- (initial capital letters) Astronomy. the constellation Antlia.
Origin of air pump
First recorded in 1650–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for air pump
Also, rarefaction by the air-pump does not injure air in the least degree.Experiments and Observations on Different Kinds of Air
It, too, was unattached at the other end; it had no connection with the air-pump.John Gayther's Garden and the Stories Told Therein
Frank R. Stockton
A new kind of existence has been given to bodies in the air-pump.Letters on England
The impulse came to him as he placed his hands on her air-pump.
Something must have happened to her air-pump above the water.
- a device for pumping air in or out of something
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