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1. An act, assertion, or belief that unintentionally deviates from what is correct, right, or true.
2. The condition of having incorrect or false knowledge.
3. The act or an instance of deviating from an accepted code of behavior.
4. A mistake.
5. Mathematics The difference between a computed or measured value and a true or theoretically correct value.
6. Abbr. E 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.

[Middle English errour, from Old French, from Latin error, from errāre, to err; see ers- in Indo-European roots.]

er′ror·less adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


without error
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.errorless - free from error; "an errorless baseball game"
perfect - being complete of its kind and without defect or blemish; "a perfect circle"; "a perfect reproduction"; "perfect happiness"; "perfect manners"; "a perfect specimen"; "a perfect day"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


Having no errors:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Then, if the spectrum is divided in two pieces of length at most 2[pi], the reconstruction is errorless. Obviously, this can happen even if the spectrum is scattered on more than two bands.
The best of these chapters discuss understanding behavior, earning instructional control, discrete trial teaching, using motivation to teach, Skinner's behavioral classification of language, errorless learning, toilet training, VB teaching procedures and the ethics of ABA.
Elements of its effective use include errorless learning procedures (e.g., Etzel & LeBlanc, 1979; Lancioni & Smeets, 1986; Terrace, 1963; Touchette & Howard, 1984) and task variation and interspersal (e.g., Dunlap, 1984; Mace, Hock, Lalli, West, Belfiore, Pinter, & Brown, 1988; Winterling, Dunlap, & O'Neill, 1987; Zarcone, Iwata, Hughes, & Vollmer, 1993).
The curriculum targets pre-K through third grade and emphasizes independent, self-paced and errorless learning.
The most consecutive errorless games by a shortstop in big league history is 110.
Under the severest pressure, Drummond produced an errorless final round of 64, equalling the best winning last round ever, to see off that gnarled old plunderer, Angel Cabrera, in a virtual head-to-head, and his 19under-par aggregate equalled the tournament record.
Stimulus fading is an errorless procedure that involves the addition of a prompting stimulus, gradually removed or faded by reducing its intensity or components (Browder & Lalli, 1991).
An errorless learning technique known as time delay transfer of stimulus control has been effectively used with students ranging in age from preschoolers to adults.
Lawrence struck out 10 and seemed to get stronger as the game progressed, but Sclafani was masterful while striking out seven, walking two and scattering 5 hits in front of an errorless defense.
The Red Sox were errorless to snap a nasty little streak of four games with at least one miscue.
The Beavers nearly had an errorless game, committing their only miscue with two outs in the ninth inning.

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