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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 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

"This is what scientists usually assume in large-scale simulated models of the Universe, but it has been hard to confirm by observation until now."

From Science Daily • Apr. 18, 2026

BBC Verify has asked Centcom to confirm the identity of the vessel in the video it published and where it was intercepted, but it has not responded.

From BBC • Apr. 17, 2026

Unesco relied on satellite imagery and local media footage to confirm the palace was damaged.

From The Wall Street Journal • Apr. 17, 2026

“If we interview Chaceley and Pike and Briar, will they confirm your story?”

From "Black Swan Green" by David Mitchell

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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