Etymology: Middle English, from Anglo-French deu, past participle of dever to owe, from Latin debēre — more at debt
Date: 14th century
1: owed or owing as a debt 2 a: owed or owing as a natural or moral right <everyone's right to dissent…is due the full protection of the Constitution — Nat Hentoff>b: according to accepted notions or procedures :appropriate<with all due respect> 3 a: satisfying or capable of satisfying a need, obligation, or duty :adequate<giving the matter due attention>b:regular, lawful<due proof of loss> 4: capable of being attributed :ascribable —used with to<this advance is partly due to a few men of genius — A. N. Whitehead> 5: having reached the date at which payment is required :payable<the rent is due> 6: required or expected in the prescribed, normal, or logical course of events :scheduled<the train is due at noon>; also: expected to give birth