Noun
1. work that you are obliged to perform for moral or legal reasons;
"the duties of the job"2. the social force that binds you to your obligations and 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 Jr3. a government tax on imports or exports;
"they signed a treaty to lower duties on trade between their countries"