debt of nature
Webster's Dictionary (GCIDE)
Debt \Debt\, n. [OE. dette, F. dette, LL. debita, fr. L. debitus owed, p. p. of debere to owe, prop., to have on loan; de- + habere to have. See Habit, and cf. Debit, Due.]
1.That which is due from one person to another, whether money, goods, or services; that which one person is bound to pay to another, or to perform for his benefit; thing owed; obligation; liability. [1913 Webster]
Your son, my lord, has paid a soldier's debt.— Shak.[1913 Webster]
When you run in debt, you give to another power over your liberty.— Franklin.[1913 Webster]
2.A duty neglected or violated; a fault; a sin; a trespass. "Forgive us our debts." --Matt. vi. 12. [1913 Webster]
3.(Law) An action at law to recover a certain specified sum of money alleged to be due. --Burrill. [1913 Webster]
Bond debt, Book debt, etc. See under Bond, Book, etc.
Debt of nature, death. [1913 Webster]