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[uh-roh-nee-uhs, e-roh-]
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  1. containing error; mistaken; incorrect; wrong: an erroneous answer.
  2. straying from what is moral, decent, proper, etc.
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Origin of erroneous

1350–1400; Middle English < Latin errōneus straying, equivalent to errōn- (stem of errō) wanderer (derivative of err-; see err) + -eus -eous
Related formser·ro·ne·ous·ly, adverber·ro·ne·ous·ness, nounnon·er·ro·ne·ous, adjectivenon·er·ro·ne·ous·ly, adverbnon·er·ro·ne·ous·ness, noun

Synonyms for erroneous

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Antonyms for erroneous

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for erroneous

untrue, inaccurate, spurious, specious, mistaken, unsound, invalid, faulty, misguided, unfounded, false, flawed, amiss, askew, awry, defective, fallacious, inexact, off

Examples from the Web for erroneous

Contemporary Examples of erroneous

Historical Examples of erroneous

  • Hence, to attribute the support solely to the surface area is erroneous.

    Flying Machines

    W.J. Jackman and Thos. H. Russell

  • The Pagoda might be an erroneous variant of the thunderbolt Vadjra.

  • The story, often copied from Withers, that Neely was killed by a wolf, is erroneous.

    Chronicles of Border Warfare

    Alexander Scott Withers

  • All of this has produced an erroneous impression that the times are out of joint.

    The Meaning of Evolution

    Samuel Christian Schmucker

  • And yet there is a further consideration: may not all these notions of friendship be erroneous?



British Dictionary definitions for erroneous


  1. based on or containing error; mistaken; incorrect
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Derived Formserroneously, adverberroneousness, noun

Word Origin for erroneous

C14: (in the sense: deviating from what is right), from Latin errōneus, from errāre to wander
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for erroneous


late 14c., from Old French erroneus and directly from Latin erroneus "vagrant, wandering" (in Late Latin "erroneous"), from erronem (nominative erro) "vagabond," from errare "to wander, err" (see err). Related: Erroneously.

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Online Etymology Dictionary, © 2010 Douglas Harper