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From Old French and Latin erroneus


  • (UK) IPA(key): /ɪˈɹəʊ.nɪ.əs/, /ɛɹˈəʊ.nɪ.əs/
  • (US) IPA(key): /ɛɹˈoʊ.ni.əs/, /ɪˈɹoʊ.ni.əs/


erroneous (comparative more erroneous, superlative most erroneous)

  1. Containing an error; inaccurate.
    His answer to the sum was erroneous.
  2. Derived from an error.
    His conclusion was erroneous, since it was based on a false assumption.
  3. Mistaken.
    Her choice at the line-up proved to be erroneous, as she had only seen the mugger for an instant.
  4. (law) signifies a deviation from the requirements of the law, but does not connote a lack of legal authority, and is thus distinguished from illegal.
    If, while having the power to act, one commits error in the exercise of that power, he acts erroneously.

Usage notesEdit

  • Nouns to which "erroneous" is often applied: impression, assumption, belief, conclusion, statement, idea, data, view, opinion, judgment, notion, decision, interpretation, diagnosis, conception, theory, reading, instruction, ruling, assessment, doctrine, advice, value, application, thinking, perception, principle, concept, action, description, record, determination, teaching, inference, premise, conviction, reasoning, argument, exclusion, calculation, inclusion, treatment, deductions, analysis.


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