The Collaborative International Dictionary of English v.0.48:
Mistake \Mis*take"\ (m[i^]s*t[=a]k"), n.
1. An apprehending wrongly; a misconception; a
misunderstanding; a fault in opinion or judgment; an
unintentional error of conduct.
Infallibility is an absolute security of the
understanding from all possibility of mistake.
2. (Law) Misconception, error, which when non-negligent may
be ground for rescinding a contract, or for refusing to
No mistake, surely; without fail; as, it will happen at the
appointed time, and no mistake. [Low]
Syn: Blunder; error; bull. See Blunder.