1.a wrong action attributable to bad judgment or ignorance or inattention;
he made a bad mistake
2.inadvertent incorrectness
3.a misconception resulting from incorrect information
4.(baseball) a failure of a defensive player to make an out when normal play would have sufficed
5.departure from what is ethically acceptable
6.(computer science) the occurrence of an incorrect result produced by a computer
7.part of a statement that is not correct;
the book was full of errors