a condition or influence that makes it necessary for sb to do sth; a duty
"we must instill a sense of duty in our children"
"every right implies a responsibility; every opportunity, an obligation; every possession, a duty"
"he is under an obligation to finish the job"
A valid obligation could not be made with the Court of Rome without communication with the Pope.
出自： G. B. Smith
她有义务赡养她的养母。 be under an obligation to-v
Every player is under an obligation to keep the rules.
每个选手都必须遵守这些规则。 lay〔place〕 sb/sth under an obligation
The court laid the young thief under an obligation to report to the police station once a week.
Their frequent invitation places us under an obligation to invite them to our house for a change.