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. (obsolete) Wandering; erratic.
  5. (law) Deviating from the requirements of the law, but without a lack of legal authority, thus not 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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