/ ɪˈrəʊniəs; NAmE ɪˈroʊ-/ adjective
( formal ) not correct; based on wrong information :
erroneous conclusions / assumptions
► er·ro·ne·ous·ly adverb
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WORD ORIGIN
late Middle English : from Latin erroneus (from erro(n-) vagabond, from errare to stray, err) + -ous .