Definition of mistaken adjective from the Oxford Advanced American Dictionary

      

    mistaken

     adjective
    adjective
    NAmE//mɪˈsteɪkən//
     
     
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  1. 1[not before noun] mistaken (about somebody/something) wrong in your opinion or judgment You are completely mistaken about Jane. Unless I'm very much mistaken, that's Paul's wife over there. I thought I saw someone I knew, but I must have been mistaken. synonyms at wrong
  2. 2based on a wrong opinion or bad judgment synonym misguided mistaken views/ideas I told her my secret in the mistaken belief that I could trust her.
  3. Thesauruswrongfalse mistaken incorrect inaccurate misguided untrueThese words all describe something that is not right or correct, or someone who is not right about something.wrong not right or correct; (of a person) not right about something:I got all the answers wrong. We were wrong to assume that she'd agree.false not true or correct; wrong because it is based on something that is not true or correct:A whale is a fish. True or false? She gave false information to the insurance company.mistaken wrong in your opinion or judgment; based on a wrong opinion or bad judgment:You're completely mistaken about Jane.incorrect (somewhat formal) wrong according to the facts; containing mistakes:Many of the statistics were incorrect.inaccurate wrong according to the facts; containing mistakes:The report was badly researched and fairly inaccurate.incorrect or inaccurate?A fact, figure, or spelling that is wrong is incorrect; information, a belief, or a description based on incorrect facts can be incorrect or inaccurate; something that is produced, such as a film, report, or map, that contains incorrect facts is inaccurate.misguided wrong because you have understood or judged a situation badly:In her misguided attempts to help, she only made the situation worse.untrue not based on facts, but invented or guessed:These accusations are totally untrue.Patterns to be wrong/mistaken about something wrong/false/mistaken/incorrect/inaccurate information a(n) false/mistaken/incorrect/inaccurate/misguided belief a(n) wrong/incorrect answer
 
adverb He mistakenly believed that his family would stand by him.
See the Oxford Advanced Learner's Dictionary entry: mistaken