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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 as it was based on a false assumption.
  3. Mistaken.
    • His choice at the line-up was erroneous as he 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.

Usage notes[edit]

  • 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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