mistake

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An error or fault resulting from defective judgment, deficient knowledge, or carelessness.
2. n. A misconception or misunderstanding.
3. v. To understand wrongly; misinterpret: mistook my politeness for friendliness.
4. v. To recognize or identify incorrectly: He mistook her for her sister.
5. v. To make a mistake; err.

Century Dictionary and Cyclopedia

1. l. To take wrongly; appropriate erroneously or through misapprehension.
2. To take or choose erroneously; choose amiss, as between alternatives; regard (something) as other than it is: as, to mistake one's road or bearings; to mistake a fixed star for a planet.
3. To take in a wrong sense; conceive or understand erroneously; misunderstand; misjudge: as, to mistake one's meaning or intentions.
4. To make a mistake; be in error; be wrong; misapprehend.
5. To take a wrong part; transgress.
6. To err in advice, opinion, or judgment; be under a misapprehension or misconception; be unintentionally in error.
7. n. An error in action, opinion, or judgment; especially, misconception, misapprehension, or misunderstanding; an erroneous view, act, or omission, arising from ignorance, confusion, misplaced confidence, etc.; a slip; a fault; an error; a blunder.
8. n. In law, an erroneous mental conception that influences the will and leads to action. Pomeroy. It is usually considered that if neglect of a legal duty was the cause it deprives the error of the character of mistake in the legal sense. See accident, 2 .
9. n. Synonyms Error, Bull, etc. See blunder.

Wiktionary

1. n. An error; a blunder.
2. n. 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
3. v. transitive To understand wrongly, taking one thing for another, or someone for someone else.
4. v. transitive To make an error, to do something in a wrong way.

GNU Webster's 1913

1. v. Obs. or R. To take or choose wrongly.
2. v. To take in a wrong sense; to misunderstand misapprehend, or misconceive
3. v. To substitute in thought or perception.
4. v. To have a wrong idea of in respect of character, qualities, etc.; to misjudge.
5. v. To err in knowledge, perception, opinion, or judgment; to commit an unintentional error.
6. n. An apprehending wrongly; a misconception; a misunderstanding; a fault in opinion or judgment; an unintentional error of conduct.
7. n. (Law) Misconception, error, which when non-negligent may be ground for rescinding a contract, or for refusing to perform it.

WordNet 3.0

1. n. an understanding of something that is not correct
2. n. a wrong action attributable to bad judgment or ignorance or inattention
3. n. part of a statement that is not correct
4. v. identify incorrectly
5. v. to make a mistake or be incorrect