Definition of obligation

• 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
• the state of being obligated to do or pay something; "he is under an obligation to finish the job"
• a personal relation in which one is indebted for a service or favor