Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Origin: de- + inflate

deflate

verb
     
Related topics: Economics
de‧flate
1 [intransitive and transitive] if a tyre, balloon etc deflates, or if you deflate it, it gets smaller because the gas inside it comes out [≠ inflate; ↪ go down, let down]
2 [transitive] to make someone feel less important or less confident:
She was deflated when Fen made no comment on her achievement.
3 [transitive] to show that a statement, argument etc is wrong:
Simkin hoped to find a way to deflate his opponent's argument.
4 [intransitive and transitive]PE technical to change economic rules or conditions in a country so that prices fall or stop rising

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