from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Containing or derived from error; mistaken: erroneous conclusions.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Containing an error; inaccurate.
  • adj. Derived from an error.
  • adj. Mistaken.
  • adj. signifies a deviation from the requirements of the law, but does not connote a lack of legal authority, and is thus distinguished from illegal.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Wandering; straying; deviating from the right course; -- hence, irregular; unnatural.
  • adj. Misleading; misled; mistaking.
  • adj. Containing error; not conformed to truth or justice; incorrect; false; mistaken

from The Century Dictionary and Cyclopedia

  • Wandering; roving; devious; unsettled; irregular.
  • Controlled by error; misled; deviating from the truth.
  • Containing error; false; mistaken; not conformable to truth or justice; liable to mislead: as, an erroneous opinion; erroneous doctrine or instruction.

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

  • adj. containing or characterized by error


Middle English, from Latin errōneus, from errō, errōn-, a vagabond, from errāre, to err, wander; see ers- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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