Containing an error; inaccurate.
His answer to the sum was erroneous.
Derived from an error.
His conclusion was erroneous, since it was based on a false assumption.
Mistaken.
Her choice at the line-up proved to be erroneous, as she had only seen the mugger for an instant.
From late Middle English erroneous, from Middle French erroneux, from Latin erroneus.
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