(transitive) To understand wrongly, taking one thing or person for another.
Sorry, I mistook you for my brother. You look very similar.
Don't mistake my kindness for weakness.
(transitive, obsolete) To misunderstand (someone).
(intransitive, obsolete) To commit an unintentional error; to do or think something wrong.
1720, Jonathan Swift, “Letter to a Young Clergyman” in The Works of Jonathan Swift, London: Charles Elliot, 1784, Volume 10, pp. 6-7,
No gentleman thinks it is safe or prudent to send a servant with a message, without repeating it more than once, and endeavouring to put it into terms brought down to the capacity of the bearer; yet, after all this care, it is frequent for servants to mistake, and sometimes occasion misunderstandings among friends […]
(obsolete, rare) To take or choose wrongly.
noun
An error.
There were too many mistakes in the test, that unfortunately you failed.
He always did mistakes on purpose.
1877, Henry Heth, quoting Robert E. Lee, in "Causes of the Defeat of Gen. Lee's Army at the Battle of GettysburgOpinions of Leading Confederate Soldiers.", Southern Historical Society Papers (1877), editor Rev. J. WM. Jones http://books.google.com/books?id=iDIFAAAAQAAJ&pg=PA292&dq=lee+%22mistakes+were+made%22&hl=en&ei=fchaTbu4L8L98AaVs4n-DQ&sa=X&oi=book_result&ct=result&resnum=3&ved=0CDUQ6AEwAg#v=onepage&q=lee%20%22mistakes%20were%20made%22&f=false
After it is all over, as stupid a fellow as I am can see that mistakes were made. I notice, however, that my mistakes are never told me until it is too late.
(baseball) A pitch which was intended to be pitched in a hard-to-hit location, but instead ends up in an easy-to-hit place.