confirm
verb
con·firm kən-ˈfərm 
confirmed; confirming; confirms
transitive verb
1
: to give approval to : ratify
confirm a treaty
2
: to make firm or firmer : strengthen
confirm one's resolve
3
: to administer the rite of confirmation to
4
: to give new assurance of the validity of : remove doubt about by authoritative act or indisputable fact
confirm a rumor
confirm an order
confirmability
kən-ˌfər-mə-ˈbi-lə-tē
noun confirmable
kən-ˈfər-mə-bəl
adjective 
Synonyms
- argue
- attest
- authenticate
- bear out
- certify
- corroborate
- substantiate
- support
- validate
- verify
- vindicate
See all Synonyms & Antonyms 
Example Sentences
The tests confirmed the doctors' suspicions of cancer. The attack confirmed her worst fears about the neighborhood. The award confirmed her status as one of the great movie actresses. The dentist's office called to confirm your appointment for tomorrow. We have a reservation for you for tomorrow night. Please call to confirm.
Recent Examples on the Web Police are still working to confirm the identity of the suspect in custody and, due to the nature of this case, Clark County Sheriff's Office said the female victim involved in the incident will not be identified at this time. 
Jon Haworth, ABC News, 6 Sep. 2022 SmartSecure System offers a great visual to confirm a secure fit since the colors change from red to green when when the seat is correctly installed. Jamie Spain, Good Housekeeping, 6 Sep. 2022 The city hasn’t made public details about the process, refusing even to confirm a vote was taken. Lance Williams, San Francisco Chronicle, 6 Sep. 2022 The specimen was retested to confirm the contamination per emergency protocol ahead of notifying the public, the mayor said. Emily Opilo, Baltimore Sun, 6 Sep. 2022 Investigators were working to confirm the outbreak's source, the CDC said. Dennis Romero, NBC News, 4 Sep. 2022 Richardson needed one game to effectively confirm 2022 will be his final season at Florida. Edgar Thompson, Orlando Sentinel, 4 Sep. 2022 Accept the geolocation request to confirm you are in Kansas. Xl Media, cleveland, 3 Sep. 2022 In addition, a spokesperson for San Jose's city manager said Bonta's office responded only to confirm receipt of the original letter after the city sent a follow-up. Thomas Catenacci, Fox News, 2 Sep. 2022 See More
Jon Haworth, ABC News, 6 Sep. 2022 SmartSecure System offers a great visual to confirm a secure fit since the colors change from red to green when when the seat is correctly installed. Jamie Spain, Good Housekeeping, 6 Sep. 2022 The city hasn’t made public details about the process, refusing even to confirm a vote was taken. Lance Williams, San Francisco Chronicle, 6 Sep. 2022 The specimen was retested to confirm the contamination per emergency protocol ahead of notifying the public, the mayor said. Emily Opilo, Baltimore Sun, 6 Sep. 2022 Investigators were working to confirm the outbreak's source, the CDC said. Dennis Romero, NBC News, 4 Sep. 2022 Richardson needed one game to effectively confirm 2022 will be his final season at Florida. Edgar Thompson, Orlando Sentinel, 4 Sep. 2022 Accept the geolocation request to confirm you are in Kansas. Xl Media, cleveland, 3 Sep. 2022 In addition, a spokesperson for San Jose's city manager said Bonta's office responded only to confirm receipt of the original letter after the city sent a follow-up. Thomas Catenacci, Fox News, 2 Sep. 2022 See More Word History
Etymology
Middle English, from Anglo-French cunfermer, from Latin confirmare, from com- + firmare to make firm, from firmus firm
First Known Use
13th century, in the meaning defined at sense 1
Kids Definition
confirm
verb
con·firm kən-ˈfərm
confirmed; confirming
1
: to make sure of the truth of
Their arrest confirms my suspicion.
2
: to make firm or firmer (as in a habit, in faith, or in intention) : strengthen
The job at the shelter confirmed her intention to become a veterinarian.
3
: approve sense 2, accept
Senators confirmed the treaty.
4
: to perform a ceremony admitting a person into a church or synagogue
Legal Definition
confirm
transitive verb
con·firm
1
a
: to make valid by necessary formal approval
the debtor's chapter 13 plan confirmed by the court
b
: to vote approval of
confirm a nomination
2
: to give formal acknowledgment of receipt of
3
: to remove doubt about by authoritative act or indisputable fact
a consent decree confirming Capt. Brown's right to his cargo W. G. Young
W. G. Youngconfirming 1 of 2
adjective
as in supporting
serving to give support to the truth or factualness of something in the absence of confirming evidence, we should give him the benefit of the doubt Synonyms & Similar Words
Relevance
- supporting
- verifying
- substantiating
- supportive
- corroborating
- confirmational
- confirmatory
- vindicating
- corroborative
- probative
- supplementary
- corroboratory
- auxiliary
- probatory
- beneficial
- helpful
Antonyms & Near Antonyms
- refuting
- disproving
- contradictory
- opposing
- contrary
- confuting
- counter
confirming
2 of 2verb
1
as in verifying
to give evidence or testimony to the truth or factualness of several eyewitnesses who can confirm the defendant's account of what happened Synonyms & Similar Words
- verifying
- arguing
- supporting
- validating
- corroborating
- attesting
- proving
- certifying
- vindicating
- authenticating
- demonstrating
- substantiating
- affirming
- witnessing
- reinforcing
- bearing out
- establishing
- declaring
- guaranteeing
- asserting
- documenting
- avowing
- warranting
- averring
- professing
- avouching
- testifying (to)
- vouching (for)
- reenforcing
- backing (up)
Antonyms & Near Antonyms
- refuting
- disproving
- denying
- contradicting
- rebutting
- disavowing
- disclaiming
- questioning
- contesting
- disputing
- challenging
- gainsaying
2
as in approving
to give official acceptance of as satisfactory the senate must confirm an appointment to an ambassadorship Synonyms & Similar Words
- approving
- ratifying
- finalizing
- accepting
- endorsing
- acknowledging
- authorizing
- sanctioning
- formalizing
- signing
- affirming
- warranting
- accrediting
- clearing
- validating
- okaying
- homologating
- certifying
- approbating
- initialing
- blessing
- enabling
- passing
- permitting
- sanctifying
- canonizing
- OK'ing
- allowing
- initialling
- indorsing
- licensing
- legalizing
- reapproving
- rubber-stamping
- licencing
- signing off (on)
Antonyms & Near Antonyms
- denying
- rejecting
- declining
- prohibiting
- disapproving
- ignoring
- vetoing
- forbidding
- disregarding
- negativing
- banning
- turning down
- enjoining
- proscribing
- disallowing
- interdicting
- neglecting
- refusing
- overlooking
- rebutting
- spurning
- illegalizing
- rebuffing