Main entry: duty
Definition: work that you are obliged to perform for moral or legal reasons
Usage: the duties of the job
Main entry: obligation, duty, responsibility
Definition: the social force that binds you to the courses of action demanded by that force
Usage: 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
Definition: a government tax on imports or exports
Usage: they signed a treaty to lower duties on trade between their countries