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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.

The Journal was able to independently confirm his identity.

From The Wall Street Journal • Apr. 16, 2026

The congressional hearing on Warsh is set for April 21, leaving 24 days for the Senate to confirm him before Powell’s term ends.

From Barron's • Apr. 16, 2026

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

From BBC • Apr. 15, 2026

Early debates confirm that this was no accident.

From Slate • Apr. 15, 2026

“Didn’t the agent who sold you the tickets tell you it wasn’t necessary to confirm on tickets purchased less than three days in advance?”

From "The Secret History" by Donna Tartt

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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