Un*due" (?), a.
Not due; not yet owing; as, an undue debt, note, or bond.
Not right; not lawful or legal; improper; as, an undue proceeding.
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.
Undue influence Law, any improper or wrongful constraint, machination, or urgency of persuasion, by which one's will is overcome and he is induced to do or forbear an act which he would not do, or would do, if left to act freely.
© Webster 1913.