• (British) IPA: /ɪˈɹəʊ.nɪ.əs/, /ɛɹˈəʊ.nɪ.əs/
  • (America) IPA: /ɛɹˈoʊ.ni.əs/, /ɪˈɹoʊ.ni.əs/


  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. (legal) 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.
Synonyms Translations

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