verb (used with object), de·flat·ed, de·flat·ing.

to release the air or gas from (something inflated, as a balloon): They deflated the tires slightly to allow the truck to drive under the overpass.
to depress or reduce (a person or a person's ego, hopes, spirits, etc.); puncture; dash: Her rebuff thoroughly deflated me.
to reduce (currency, prices, etc.) from an inflated condition; to affect with deflation.

verb (used without object), de·flat·ed, de·flat·ing.

to become deflated.

Origin of deflate

1890–95; < Latin dēflātus blown off, away (past participle of dēflāre), equivalent to dē- de- + fl(āre) to blow + -ātus -ate1
Related formsde·fla·tor, nounself-de·flat·ed, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for deflated

Contemporary Examples of deflated

Historical Examples of deflated

  • Johnson deflated his area of the room with his breath intake.

    Measure for a Loner

    James Judson Harmon

  • Like a punctured ballon it deflated and became a shriveled, clinging thing.

  • As has been said, Joe deflated his lungs just before he took his dive.

  • He deflated his chest, spread his heels, and ceased to draw in his abdomen.

  • Which deflated that particular enterprise for the moment, anyway.

    The Killer

    Stewart Edward White

British Dictionary definitions for deflated



to collapse or cause to collapse through the release of gas
(tr) to take away the self-esteem or conceit from
economics to cause deflation of (an economy, the money supply, etc)
Derived Formsdeflator, noun

Word Origin for deflate

C19: from de- + (in) flate
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 deflated



1891, in reference to balloons, coinage based on inflate. Latin deflare meant "to blow away," but in the modern word the prefix is taken in the sense of "down." Related: Deflated; deflating.

Online Etymology Dictionary, © 2010 Douglas Harper