WordReference Random House Learner's Dictionary of American English © 2026
er•ro•ne•ous /əˈroʊniəs, ɛˈroʊ-/USA pronunciation
adj.
er•ro•ne•ous•ness, n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2026- containing error;
mistaken;
incorrect:The facts are correct but your conclusion is erroneous.
er•ro•ne•ous•ness, n. [uncountable]
er•ro•ne•ous
(ə rō′nē əs, e rō′-),USA pronunciation adj.
er•ro′ne•ous•ly, adv.
er•ro′ne•ous•ness, n.
- containing error;
mistaken;
incorrect;
wrong:an erroneous answer. - straying from what is moral, decent, proper, etc.
- Latin errōneus straying, equivalent. to errōn- (stem of errō) wanderer (derivative of err-; see err) + -eus -eous
- Middle English 1350–1400
er•ro′ne•ous•ness, n.
- 1.See corresponding entry in Unabridged inaccurate, untrue, false.
- 1.See corresponding entry in Unabridged accurate.
'erroneously' also found in these entries (note: many are not synonyms or translations):
Edda
- Eskimo
- Ibero-Maurusian
- Nicene Creed
- Vulcan
- amido-
- aril
- barbarism
- bartizan
- bustard
- bêche-de-mer
- calcinosis
- choroid
- collimate
- confound
- derring-do
- durmast
- encyclopedia
- equinoctial storm
- erron.
- false vampire
- furfurol
- geratology
- gonys
- guerrilla
- hidropoiesis
- imido group
- mantispid
- marquee
- mis-
- misbrand
- miscount
- misdiagnose
- mistake
- nelson
- orchido-
- ounce
- overbudget
- phraseology
- plantain-eater
- ptomaine poisoning
- pucellas
- raptorial
- syllabus
- tamale
- tin god
- unctuarium
- vampire bat
- verminate