Definition of confirm | Collins English Dictionary

confirm (kənˈfɜːm)

(may take a clause as object) to prove to be true or valid; corroborate; verify
(may take a clause as object) to assert for a second or further time, so as to make more definite ⇒ he confirmed that he would appear in court
to strengthen or make more firm ⇒ his story confirmed my doubts
to make valid by a formal act or agreement; ratify
to administer the rite of confirmation to

conˈfirmable adjective conˈfirmatory conˈfirmative adjective conˈfirmer noun

C13: from Old French confermer, from Latin confirmāre, from firmusfirmC13: from Old French from Latin from ¹

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British English: confirm If something confirms what you believe, it shows that it is definitely true.X-rays have confirmed that he has not broken any bones.kənˈfɜːm VERB X-rays have confirmed that he has not broken any bones.
Spanish: confirmar v
French: confirmer vt
German: bestätigen v
Chinese: 确认 v
Arabic: يُؤَكِّدُ عَلَى v
Portuguese: confirmar v
Russian: подтверждать v
Croatian: potvrditi v
Czech: potvrdit v potvrzovat
Danish: bekræfte v
Dutch: bevestigen v
Finnish: vahvistaa v
Greek: επιβεβαιώνω v
Italian: confermare v
Japanese: 確認する v
Korean: 확인하다 v
Norwegian: bekrefte v
Polish: potwierdzić v potwierdzać
Brazilian Portuguese: confirmar v
European Spanish: confirmar v
Swedish: bekräfta v
Thai: ยืนยัน v
Turkish: doğrulamak v
Vietnamese: xác nhận v

They nodded, but reproachfully, as if she was unkind to confirm their worst suspicions.
Gee, Maggie, Lost Children (1994)
China Team have until 29 April - the challenge list deadline for the 2007 event - to confirm their bid.
Yachting Boating World (2005)
The staff at the store could not confirm yesterday the price of the dress or the name of the designer.
Globe and Mail (2003)
The embassy could not yet confirm the extent of loss of life or injury to the plane's passengers or crew, he added.
Glasgow Herald (2001)
Given the slow march of geological change, it is unlikely that mankind will be here to confirm whether this is true or not.
Richard Fortey, THE EARTH: An Intimate History (2004)