Noah Webster's New International Dictionary of the English Language
1. (a.) Owed, as a debt; that ought to be paid or done to or for another; payable; owing and demandable.
2. (a.) Justly claimed as a right or property; proper; suitable; becoming; appropriate; fit.
3. (a.) Such as (a thing) ought to be; fulfilling obligation; proper; lawful; regular; appointed; sufficient; exact; as, due process of law; due service; in due time.
4. (a.) Appointed or required to arrive at a given time; as, the steamer was due yesterday.
5. (a.) Owing; ascribable, as to a cause.
6. (adv.) Directly; exactly; as, a due east course.
7. (n.) That which is owed; debt; that which one contracts to pay, or do, to or for another; that which belongs or may be claimed as a right; whatever custom, law, or morality requires to be done; a fee; a toll.
8. (n.) Right; just title or claim.
9. (v. t.) To endue.