verb de·flate \ di-ˈflāt , ˌdē- \
|Updated on: 14 Jul 2018

Definition of deflate

deflated; deflating
1 : to release air or gas from
  • deflate a tire
2 : to reduce in size, importance, or effectiveness
  • deflate his ego with cutting remarks
3 : to reduce (a price level) or cause (a volume of credit) to contract
: to lose firmness through or as if through the escape of contained gas


or less commonly deflater play \-ˈflā-tər\ noun

Examples of deflate in a Sentence

  1. The birthday balloons deflated after a few days.

  2. The harsh criticism left him utterly deflated.

  3. an insult that would deflate their egos

  4. He has worked to deflate popular myths about investing.

  5. Deflated prices mean that farmers are getting less for their products.

Recent Examples of deflate from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'deflate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of deflate

de- + -flate (as in inflate)

Synonym Discussion of deflate

contract, shrink, condense, compress, constrict, deflate mean to decrease in bulk or volume. contract applies to a drawing together of surfaces or particles or a reduction of area or length.
    • caused her muscles to contract
shrink implies a contracting or a loss of material and stresses a falling short of original dimensions.
    • the sweater will shrink when washed
condense implies a reducing of something homogeneous to greater compactness without significant loss of content.
    • condense the essay into a paragraph
compress implies a pressing into a small compass and definite shape usually against resistance.
    • compressed cotton into bales
constrict implies a tightening that reduces diameter.
    • the throat is constricted by a tight collar
deflate implies a contracting by reducing the internal pressure of contained air or gas.
    • deflate the balloon

DEFLATE Defined for English Language Learners


Definition of deflate for English Language Learners

  • : to release air or gas from (something, such as a tire or balloon) and make it smaller

  • : to lose air or gas from inside

  • : to make (someone) lose confidence or pride

DEFLATE Defined for Kids


verb de·flate \ di-ˈflāt \

Definition of deflate for Students

deflated; deflating
1 : to let the air or gas out of something that has been blown up
2 : to reduce in size or importance
  • The criticism deflated her confidence.

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a downward inclination or slope

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