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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.

"I can confirm that there was an attack against the Greek cargo ship, but I cannot confirm that this has been seized by the Iranians," Gerapetritis told CNN.

From BBC • Apr. 22, 2026

He did not confirm if the government was participating in a second round of negotiations.

From Los Angeles Times • Apr. 22, 2026

Iran, meanwhile, has yet to confirm its attendance at the next round of peace talks in Islamabad, and continues to maintain control of the strait in the meantime.

From Barron's • Apr. 21, 2026

On her third visit, as Crain’s condition deteriorated, a doctor did not send Crain to the intensive care unit until he could confirm fetal demise with two ultrasounds.

From Salon • Apr. 20, 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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