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Definitions

confirm

[kuhn-furm] / kənˈfɜrm /
VERB
ratify, validate, prove
Synonyms
STRONGEST
affirm approve back certify corroborate endorse establish explain sign substantiate support uphold verify
STRONG
attest authenticate bless buy check circumstantiate debunk double-check justify okay sanction settle subscribe underpin vouch warrant witness
WEAK
bear out check out give green light give high sign give stamp of approval give the go-ahead give the nod lap up make good make sure rubber-stamp sign off on size up thumbs-up
Antonyms
STRONGEST
confuse contradict deny disallow disapprove discredit disprove invalidate oppose refuse reject
STRONG
disagree refute veto
WEAK
annul cancel destroy repudiate void
VERB
reinforce
Synonyms
STRONGEST
assure establish
STRONG
buttress clinch fix fortify invigorate settle strengthen
WEAK
make firm
Antonyms
STRONG
discourage dishearten dissuade hurt unsettle weaken
WEAK
annul cancel contradict deny destroy disprove invalidate oppose repudiate veto void

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

On Wednesday, the 23-year-old went for scans, which are expected to confirm the extent of the damage.

From BBC • Apr. 15, 2026

To confirm their findings, Liu collaborated with physicist Federico Toschi at Eindhoven University of Technology in the Netherlands.

From Science Daily • Apr. 15, 2026

Chief trial counsel George Cardona said the three cases demonstrate how justice is undermined when attorneys fail to confirm the accuracy of their submissions to the court.

From Los Angeles Times • Apr. 14, 2026

“We require all our vendors to regularly conduct testing for restricted substances, including PFAS, by credible third-party agencies to confirm ongoing compliance.”

From Barron's • Apr. 13, 2026

She nodded at her husband as if to confirm something they had talked about.

From "How the García Girls Lost Their Accents" by Julia Alvarez

Vocabulary lists containing confirm

Jim Burke's Academic Vocabulary List

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The SAT: Language of the Test, List 3

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The Language of Standardized Tests, List 2

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