mistake mistake /mɪˈsteɪk/

noun

1. () A wrong action attributable to bad judgment, ignorance or inattention  ( fault , mistake , error )
   a wrong action attributable to bad judgment, ignorance or inattention
    He made a bad mistake
   he made a bad mistake
    She was quick to point out my errors
   she was quick to point out my errors
    I could understand his English in spite of his grammatical faults
   I could understand his English in spite of his grammatical faults
   
2. () An understanding of something that is not correct  ( misapprehension , misunderstanding , mistake )
   an understanding of something that is not correct
    He wasn't going to admit his mistake
   he wasn't going to admit his mistake
    Make no mistake about his intentions
   make no mistake about his intentions
    There must be some misunderstanding--I don't have a sister
   there must be some misunderstanding--I don't have a sister
   
3. () Part of a statement that is not correct  ( error , mistake )
   part of a statement that is not correct
    The book was full of errors
   the book was full of errors
   

verb

1. () Identify incorrectly  ( misidentify , mistake )
   identify incorrectly
    Don't mistake her for her twin sister
   Don't mistake her for her twin sister
   
2. To make a mistake or be incorrect  ( mistake , slip , err )
   to make a mistake or be incorrect
     I apologize for any mistakes I may have made. I didn't mean to err.
   I apologize for any mistakes I may have made. I didn't mean to err.