Meaning : The social force that binds you to the courses of action demanded by that force.
Example :
We must instill a sense of duty in our children.
Every right implies a responsibility; every opportunity, an obligation; every possession, a duty.
Synonyms : obligation, responsibility
Meaning : Work that you are obliged to perform for moral or legal reasons.
Example :
The duties of the job.
Meaning : A government tax on imports or exports.
Example :
They signed a treaty to lower duties on trade between their countries.
Synonyms : tariff