obligation: something that somebody is obliged to do for moral, legal, or religious reasons
need to meet obligations: the urge to meet moral or religious obligations
allocated task: a task or service allocated to somebody, especially in the course of work
Synonyms: responsibility, obligation, onus, burden, calling, liability
Definition of obligation
duty: something that must be done because of legal or moral duty
state of being obligated: the state of being under a moral or legal duty to do something
gratitude owed: something that somebody owes in return for something given, e.g. assistance or a favor