error

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An act, assertion, or belief that unintentionally deviates from what is correct, right, or true.
• noun The condition of having incorrect or false knowledge.
• noun The act or an instance of deviating from an accepted code of behavior.
• noun A mistake.
• noun Mathematics The difference between a computed or measured value and a true or theoretically correct value.
• noun Baseball A defensive fielding or throwing misplay by a player when a play normally should have resulted in an out or prevented an advance by a base runner.

from The Century Dictionary.

• noun In base-ball, a failure by one of the fielders to put out an opponent when he has the opportunity; a misplay by which a runner secures a base.
• In law, upon an appeal, to reverse the judgment or other determination of the court below, on account of error in its proceedings.
• noun A wandering; a devious and uncertain course.
• noun A deviation from the truth; a discrepancy between what is thought to be true and what is true; an unintentional positive falsity; a false proposition or mode of thought.
• noun An inaccuracy due to oversight or accident; something different from what was intended, especially in speaking, writing, or printing: as, a clerical error (which see, below).
• noun A wrong-doing; a moral fault; a sin, especially one that is not very heinous.
• noun The difference between the observed or otherwise determined value of a physical quantity and the true value: also called the true error.
• noun In law, a mistake in a judicial determination of a court, whether in deciding wrongly on the merits or ruling wrongly on an incidental point, to the prejudice of the rights of a party.
• noun Perplexity; anxiety; concern.

from the GNU version of the Collaborative International Dictionary of English.

• noun obsolete A wandering; a roving or irregular course.
• noun A wandering or deviation from the right course or standard; irregularity; mistake; inaccuracy; something made wrong or left wrong
• noun A departing or deviation from the truth; falsity; false notion; wrong opinion; mistake; misapprehension.
• noun A moral offense; violation of duty; a sin or transgression; iniquity; fault.
• noun (Math.) The difference between the approximate result and the true result; -- used particularly in the rule of double position.
• noun The difference between an observed value and the true value of a quantity.
• noun The difference between the observed value of a quantity and that which is taken or computed to be the true value; -- sometimes called residual error.
• noun (Law.) A mistake in the proceedings of a court of record in matters of law or of fact.
• noun (Baseball) A fault of a player of the side in the field which results in failure to put out a player on the other side, or gives him an unearned base.
• noun (Mensuration) the law which expresses the relation between the magnitude of an error and the frequency with which that error will be committed in making a large number of careful measurements of a quantity.
• noun (Mensuration) See under Probable.
• noun (Law) an original writ, which lies after judgment in an action at law, in a court of record, to correct some alleged error in the proceedings, or in the judgment of the court.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun uncountable The state, quality, or condition of being wrong.
• noun countable A mistake; an accidental wrong action or a false statement not made deliberately.
• noun computing, countable A failure to complete a task, usually involving a premature termination.
• noun statistics, countable The difference between a measured or calculated value and a true one.
• noun baseball, countable A play which is scored as having been made incorrectly.
• noun uncountable One or more mistakes in a trial that could be grounds for review of the judgement.
• verb computing To function improperly due to an error, especially accompanied by error message.
• verb telecommunications To show or contain an error or fault.
• verb nonstandard To err.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun inadvertent incorrectness
• noun departure from what is ethically acceptable
• noun (baseball) a failure of a defensive player to make an out when normal play would have sufficed
• noun a wrong action attributable to bad judgment or ignorance or inattention
• noun (computer science) the occurrence of an incorrect result produced by a computer
• noun part of a statement that is not correct
• noun a misconception resulting from incorrect information