Containing an error; inaccurate.
* His answer to the sum was erroneous .
Derived from an error.
* His conclusion was erroneous as it was based on a false assumption.
* His choice at the line-up was erroneous as he had only seen the mugger for an instant.
(legal) 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 .
* 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.
* (containing an error) inaccurate, incorrect, wrong
* (derived from an error) fallacious, false, faulty, flawed
* (mistaken) mistaken, wrong
Not suitable; unfit; inappropriate.