[ uh-roh-nee-uhs, e-roh- ]
/ əˈroʊ ni əs, ɛˈroʊ- /


containing error; mistaken; incorrect; wrong: an erroneous answer.
straying from what is moral, decent, proper, etc.

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 forms Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for erroneousness

British Dictionary definitions for erroneousness


/ (ɪˈrəʊnɪəs) /


based on or containing error; mistaken; incorrect
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 erroneousness



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.

Online Etymology Dictionary, © 2010 Douglas Harper