inflate

verb

in·​flate in-ˈflāt 

inflated; inflating

transitive verb

1

: to swell or distend with air or gas

2

: to puff up : elate

inflate one's ego

3

: to expand or increase abnormally or imprudently

rapid economic growth that inflates prices

intransitive verb

: to become inflated

inflator noun

or inflater

in-ˈflā-tər 

Choose the Right Synonym for inflate

expand, amplify, swell, distend, inflate, dilate mean to increase in size or volume.

expand may apply regardless of the manner of increase (such as growth, unfolding, addition of parts).

a business that expands every year

amplify implies the extension or enlargement of something inadequate.

amplify the statement with details

swell implies gradual expansion beyond a thing's original or normal limits.

the bureaucracy swelled to unmanageable proportions

distend implies outward extension caused by pressure from within.

a distended abdomen

inflate implies expanding by introduction of air or something insubstantial and suggests a vulnerability to sudden collapse.

an inflated ego

dilate applies especially to expansion of circumference.

dilated pupils

Examples of inflate in a Sentence

We used a pump to inflate the raft.

Economists warn that rapid economic growth could inflate prices.

Increased competition has inflated salaries among professional athletes.

Rapid economic growth may cause prices to inflate.

Recent Examples on the Web

This week, plaintiff Matthew Stockov filed a lawsuit in a United States District Court of the Northern District of Illinois alleging that Costco inflated its prices due to the tariff shock. —Kate Nishimura, Sourcing Journal, 13 Mar. 2026

Schemes of this scale distort care decisions, inflate utilization, and drain public trust from healthcare institutions. —Linda D. Gadd, The Orlando Sentinel, 13 Mar. 2026

And that total was inflated by KU’s senior day, with Peterson and Bidunga playing off the bench to make room for seniors in the starting five. —Shreyas Laddha, Kansas City Star, 13 Mar. 2026

Delivering air flow of 350 L/min, the Pico Pump can inflate a sleeping pad in just 30 seconds, an air bed in 150 seconds, and an 80-inch (203 cm) boat in 330 seconds. —New Atlas, 13 Mar. 2026

Word History

Etymology

Middle English, from Latin inflatus, past participle of inflare, from in- + flare to blow — more at blow

First Known Use

15th century, in the meaning defined at transitive sense 1

Rhymes for inflate

• abate
• airfreight
• await
• baseplate
• berate
• birthdate
• birthrate
• bookplate
• borate
• breastplate
• bromate
• casemate

Kids Definition

inflate

verb

in·​flate in-ˈflāt 

inflated; inflating

1

: to swell or fill with air or gas

inflate a balloon

2

: to increase abnormally

inflated prices

inflatable

-ə-bəl

adjective

Medical Definition

inflate

verb

in·​flate in-ˈflāt 

inflated; inflating

transitive verb

: to swell or distend with air or gas

inflate the lungs

intransitive verb

: to become inflated

inflation

in-ˈflā-shən 

noun