definition of
[duty]

[1] #1 duty n. [responsibility, 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 Jr. wn

[2] #2 duty n. work that you are obliged to perform for moral or legal reasons; "the duties of the job". wn

[3] #3 duty n. [tariff] a government tax on imports or exports; "they signed a treaty to lower duties on trade between their countries". wn