(1):

(n.) An action at law to recover a certain specified sum of money alleged to be due.

(2):

(n.) 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.

(3):

(n.) A duty neglected or violated; a fault; a sin; a trespass.