<p><strong>Noun:</strong></p><ul><li>a deviation from accuracy or correctness; a mistake, as in action or speech: His speech contained several factual errors.</li><li>Synonyms: oversight, slip, blunder</li><li>belief in something untrue; the holding of mistaken opinions.</li><li>the condition of believing what is not true: in error about the date.</li><li>a moral offense; wrongdoing; sin.</li><li>Synonyms: misdeed, trespass, transgression, fault</li><li>Baseball: a misplay that enables a base runner to reach base safely or advance a base, or a batter to have a turn at bat prolonged, as the dropping of a ball batted in the air, the fumbling of a batted or thrown ball, or the throwing of a wild ball, but not including a passed ball or wild pitch.</li><li>Mathematics: the difference between the observed or approximately determined value and the true value of a quantity.</li><li>Law: a mistake in a matter of fact or law in a case tried in a court of record.</li><li>writ of error.</li><li>Philately: a stamp distinguished by an error or errors in design, engraving, selection of inks, or setting up of the printing apparatus.</li></ul>