erroneous

Etymology

From late Middle English erroneous, from Middle French erroneux, from Latin erroneus. Equivalent to erro(r) + -neous.

adj

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">law) Deviating from the requirements of the law">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.