Noah Webster's New International Dictionary of the English Language

1. (a.) Not right; not deserved or legal; improper; as, undue attention.

2. (a.) Not due; not yet owing; as, an undue debt, note, or bond.

3. (a.) Not agreeable to a rule or standard, or to duty; disproportioned; excessive; immoderate; inordinate; as, an undue attachment to forms; an undue rigor in the execution of law.