(Christianity, chiefly Roman Catholicism) the obligation to attend a church service (mass) on Sundays; failing to fulfil this obligation without excuse constitutes a grave sin

(law) A duty which one owes and ought to perform on the basis of considerations of right and wrong, but which he is not legally bound to fulfill, as a duty to be charitable, a duty to pay a debt barred by the act of limitations, etc.

(law) A duty by which a party to an agreement is legally bound to pay the maturity of a debt at a time and in a manner as is stipulated within a given contract or promissory note.

(law) A branch of private law under civil-law legal systems concerning the rights and duties arising between individuals.

plural of moral obligation

(finance) a form of securitization where payments from multiple middle-sized and large business loans are pooled together and passed on to different classes of owners in various tranches

(finance) a type of asset-backed security and structured credit product constructed from a portfolio of fixed-income assets.

(Catholicism) A feast day on which the faithful are expected to attend Mass.

plural of holy day of obligation

plural of collateralized debt obligation