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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.

Before you do anything, confirm whether your husband’s pension is single life, or if it has a joint and survivor inclusion.

From MarketWatch • Apr. 4, 2026

Wall Street economists are expecting a March jobs rebound, but a disappointing report would confirm deeper concerns about the economy.

From The Wall Street Journal • Apr. 3, 2026

Capital Group declined to confirm the reported $ 210 million sale price, but the building was last appraised in late 2024 at $212.5 million, down from $605 million 10 years earlier, according to Bloomberg.

From Los Angeles Times • Apr. 3, 2026

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

From Science Daily • Apr. 2, 2026

The man blinks slowly and looks around as if he's hoping someone will confirm what he's just witnessed.

From "The Sky at Our Feet" by Nadia Hashimi

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