Webster's Revised Unabridged Dictionary · 1913

Due

Due , adjective

[Old French deu, French , past participle of devoir to owe, from Latin debere. See Debt, Habit, and compare Duty.]

1.
Owed, as a debt; that ought to be paid or done to or for another; payable; owing and demandable.
2.
Justly claimed as a right or property; proper; suitable; becoming; appropriate; fit.
Her obedience, which is due to me. — Shakespeare
With dirges due, in sad array, Slow through the churchway path we saw him borne. — Gray
3.
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.
Appointed or required to arrive at a given time; as, the steamer was due yesterday.
5.
Owing; ascribable, as to a cause.
This effect is due to the attraction of the sun. — J. D. Forbes

Due , adverb

Directly; exactly; as, a due east course.

Due , noun

1.
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.
He will give the devil his due. — Shakespeare
Yearly little dues of wheat, and wine, and oil. — Tennyson
2.
Right; just title or claim.
The key of this infernal pit by due... I keep. — Milton

Due , transitive verb

To endue. [Obsolete] — Shakespeare