[ ih-roh-nee-uhs, e-roh- ]
See synonyms for: erroneouserroneouslyerroneousness on

  1. containing error; mistaken; incorrect; wrong: an erroneous answer.

  2. straying from what is moral, decent, proper, etc.

Origin of erroneous

First recorded in 1350–1400; Middle English, from Latin errōneus “straying,” equivalent to errōn- (stem of errō ) “wanderer” (derivative of err-; see err) + -eus adjective suffix (see -eous)

Other words for erroneous

Opposites for erroneous

Other words from erroneous

  • er·ro·ne·ous·ly, adverb
  • er·ro·ne·ous·ness, noun
  • non·er·ro·ne·ous, adjective
  • non·er·ro·ne·ous·ness, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use erroneous in a sentence

British Dictionary definitions for erroneous


/ (ɪˈrəʊnɪəs) /

  1. based on or containing error; mistaken; incorrect

Origin of erroneous

C14: (in the sense: deviating from what is right), from Latin errōneus, from errāre to wander

Derived forms of erroneous

  • erroneously, adverb
  • erroneousness, noun

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