Obligation

The act of obligating.

That which obligates or constrains; the binding power of a promise, contract, oath, or vow, or of law; that which constitutes legal or moral duty.

Any act by which a person becomes bound to do something to or for anouther, or to forbear something; external duties imposed by law, promise, or contract, by the relations of society, or by courtesy, kindness, etc.

The state of being obligated or bound; the state of being indebted for an act of favor or kindness; as, to place others under obligations to one.

A bond with a condition annexed, and a penalty for nonfulfillment. In a larger sense, it is an acknowledgment of a duty to pay a certain sum or do a certain things.

the social force that binds you to the courses of action demanded by that force; "we must instill a sense of duty in our children"; "every right implies a responsibility; every opportunity, an obligation; every possession, a duty" - John D.Rockefeller Jr

a legal agreement specifying a payment or action and the penalty for failure to comply

a written promise to repay a debt

a personal relation in which one is indebted for a service or favor