noun
                                                the social force that binds you to the courses of action demanded by that force
                                                                                                Synonyms
                                                
                                                
                                                                                                Examples
                                                
                                                                                                        - 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
 
                                                                                        
                                                noun
                                                the state of being obligated to do or pay something
                                                
                                                                                                Examples
                                                
                                                                                                        - he is under an obligation to finish the job
 
                                                                                        
                                                noun
                                                a personal relation in which one is indebted for a service or favor
                                                                                                Synonyms
                                                
                                                
                                                                                             
                                                                                        
                                                noun
                                                a written promise to repay a debt
                                                                                                Synonyms
                                                
                                                                                                                                                                        debt instrument
                                                                                                                                                                                                                                certificate of indebtedness
                                                                                                                                                            
                                                
                                                                                             
                                                                                        
                                                noun
                                                a legal agreement specifying a payment or action and the penalty for failure to comply