a person or thing that ventilates.
a contrivance or opening for replacing foul or stagnant air with fresh air.
Medicine/Medical. a respirator.

Origin of ventilator

First recorded in 1735–45; ventilate + -or2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ventilator

Contemporary Examples of ventilator

Historical Examples of ventilator

British Dictionary definitions for ventilator



an opening or device, such as a fan, used to ventilate a room, building, etc
med a machine that maintains a flow of air into and out of the lungs of a patient who is unable to breathe normally
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

Word Origin and History for ventilator

1743, agent noun from ventilate. Latin ventilator meant "a winnower."

Online Etymology Dictionary, © 2010 Douglas Harper