n. 义务；债务；承付款项（obligation的复数）

n the social force that binds you to the courses of action demanded by that force; every opportunity, an obligation; every possession, a duty"- John D.Rockefeller Jr

n the state of being obligated to do or pay something

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

n a written promise to repay a debt

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