Definition of confirm verb from the Oxford Advanced Learner's Dictionary

        

    confirm

     verb
    verb
    BrE BrE//kənˈfɜːm//
     
    ; NAmE NAmE//kənˈfɜːrm//
     
    Verb Forms present simple I / you / we / they confirm
    BrE BrE//kənˈfɜːm//
     
    ; NAmE NAmE//kənˈfɜːrm//
     
    he / she / it confirms
    BrE BrE//kənˈfɜːmz//
     
    ; NAmE NAmE//kənˈfɜːrmz//
     
    past simple confirmed
    BrE BrE//kənˈfɜːmd//
     
    ; NAmE NAmE//kənˈfɜːrmd//
     
    past participle confirmed
    BrE BrE//kənˈfɜːmd//
     
    ; NAmE NAmE//kənˈfɜːrmd//
     
    -ing form confirming
    BrE BrE//kənˈfɜːmɪŋ//
     
    ; NAmE NAmE//kənˈfɜːrmɪŋ//
     
    Experiments and research
     
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  1. 1  to state or show that something is definitely true or correct, especially by providing evidence confirm something Rumours of job losses were later confirmed His guilty expression confirmed my suspicions. Please write to confirm your reservation (= say that it is definite). confirm (that)… Has everyone confirmed (that) they’re coming? confirm what/when, etc… Can you confirm what happened? it is confirmed that… It has been confirmed that the meeting will take place next week. See related entries: Experiments and research
  2. 2  confirm something | confirm somebody (in something) to make somebody feel or believe something even more strongly The walk in the mountains confirmed his fear of heights.
  3. 3  to make a position, an agreement, etc. more definite or official; to establish somebody/something firmly confirm something After a six-month probationary period, her position was confirmed. confirm somebody as something He was confirmed as captain for the rest of the season. confirm somebody in something I'm very happy to confirm you in your post.
  4. 4[usually passive] confirm somebody to make somebody a full member of the Christian Church She was baptized when she was a month old and confirmed when she was thirteen.
  5. Word Origin Middle English: from Old French confermer, from Latin confirmare, from con- ‘together’ + firmare ‘strengthen’ (from firmus ‘firm’).Extra examples I wanted to find a way to experimentally confirm the results. The plans were officially confirmed yesterday. These new symptoms tend to confirm my original diagnosis. These results were independently confirmed in a study of 48 patients. This latest tragedy merely confirms my view that the law must be tightened. Your veterinarian will suggest some tests to help confirm the diagnosis. Both teams played badly, which confirms the impression left by earlier games. Has everyone confirmed that they’re coming? It has been confirmed that Moore’s next fight will be against Michael Jones. Please write to confirm your reservation. Rumours of job losses were later confirmed. The doctor confirmed my suspicions and prescribed an antibiotic. The results confirm the findings of our earlier research.
See the Oxford Advanced American Dictionary entry: confirm