[ dih-fleyt ]
/ dɪˈfleɪt /

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


de·fla·tor, nounself-de·flat·ed, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for deflate

British Dictionary definitions for deflate

/ (dɪˈfleɪt) /


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 forms of deflate

deflator, 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