What is the meaning of Obligation?

The act of binding oneself by a social, legal, or moral tie to someone.

A social, legal, or moral requirement, duty, contract, or promise that compels someone to follow or avoid a particular course of action.

A course of action imposed by society, law, or conscience by which someone is bound or restricted.

A legal agreement stipulating a specified action or forbearance by a party to the agreement; the document containing such agreement.

Reason for being obliged to, that is, grateful for, something.

obligation

bond

Alternative form of obligacioun

(government) bond

Source: wiktionary.org