From Longman Dictionary of Contemporary Englishget the wrong ideaget the wrong ideaUNTRUEto think that something is true when it is not Don’t get the wrong idea about Dan and Helen – they’re just friends. → idea
Examples from the Corpus
get the wrong idea• People have got the wrong idea about this one.• People often got the wrong idea about Nanny Ogg, and she took care to see that they did.• A lot of people get the wrong idea.• Don't get the wrong idea - the Dixons aren't as arrogant as they sound. 