If you say that someone has an obligation to do something or a duty to do something, you mean that they ought to do it, because it is their responsibility. When obligation and duty are used like this, they have the same meaning.
Your duties are the things that you do as part of your job.
Be Careful!
Don't refer to the things that you do as part of your job as 'obligations'.
| Noun | 1. | 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 Jrjob - the responsibility to do something; "it is their job to print the truth" safekeeping, guardianship, keeping - the responsibility of a guardian or keeper; "he left his car in my keeping" social control - control exerted (actively or passively) by group action moral obligation - an obligation arising out of considerations of right and wrong; "he did it out of a feeling of moral obligation" noblesse oblige - the obligation of those of high rank to be honorable and generous (often used ironically) burden of proof - the duty of proving a disputed charge civic duty, civic responsibility - the responsibilities of a citizen filial duty - duty of a child to its parents imperative - some duty that is essential and urgent incumbency - a duty that is incumbent upon you legal duty - acts which the law requires be done or forborne line of duty - all that is normally required in some area of responsibility white man's burden - the supposed responsibility of the white race to provide care for their non-white subjects prerequisite, requirement - something that is required in advance; "Latin was a prerequisite for admission" requirement, demand - required activity; "the requirements of his work affected his health"; "there were many demands on his time" |
| 2. | obligation - the state of being obligated to do or pay something; "he is under an obligation to finish the job" state - the way something is with respect to its main attributes; "the current state of knowledge"; "his state of health"; "in a weak financial state" | |
| 3. | obligation - a personal relation in which one is indebted for a service or favor personal relation, personal relationship - a relation between persons | |
| 4. | obligation - a written promise to repay a debt cash equivalent - a highly liquid debt instrument with maturities of less than three months certificate of deposit, CD - a debt instrument issued by a bank; usually pays interest note of hand, promissory note, note - a promise to pay a specified amount on demand or at a certain time; "I had to co-sign his note at the bank" document - a written account of ownership or obligation floater - a debt instrument with a variable interest rate tied to some other interest rate (e.g. the rate paid by T-bills) bond certificate, bond - a certificate of debt (usually interest-bearing or discounted) that is issued by a government or corporation in order to raise money; the issuer is required to pay a fixed sum annually until maturity and then a fixed sum to repay the principal | |
| 5. | obligation - a legal agreement specifying a payment or action and the penalty for failure to comply written agreement - a legal document summarizing the agreement between parties debt - an obligation to pay or do something |