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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 results confirm that multiple optical links can operate at the same time without significant interference.

From Science Daily • Apr. 2, 2026

The FDA has yet to confirm that E. coli has been found in any Raw Farm products, he said.

From Los Angeles Times • Apr. 2, 2026

The app is being used to confirm the drinking age of users at supermarkets, book doctors’ appointments and enter museums.

From The Wall Street Journal • Apr. 1, 2026

"Janelia had a one-of-a-kind setup that let us test and confirm what we were seeing."

From Science Daily • Apr. 1, 2026

He reached out and touched it again, just to confirm that it did still feel like ice.

From "Half Upon a Time" by James Riley

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.