a promise, duty or condition that shows what action ought to be taken (e.g. the law, one's duty, a sense of what is right)
responsibility
Cases of word usage
1) the state of living unmarried or not having sexual intercourse, especially as a religious obligation (celibacy)
2) something that it is essential to see, do, hear etc; (used to express an obligation or an order) (must)
3) (of a person) legally or morally having to carry out a duty, care (for a person, thing); involving the obligation to make decisions for others and bear the blame for their mistakes (responsible)
