misunderstanding in WordNet English dictionary

1. an understanding of something that is not correct
   "he wasn't going to admit his mistake"; "make no mistake about his intentions"; "there must be some misunderstanding--I don't have a sister"
   mistake  misunderstanding  misapprehension 
   
2. putting the wrong interpretation on
   "his misinterpretation of the question caused his error"; "there was no mistaking her meaning"
   misinterpretation  misunderstanding  mistaking