1. [noun] That which one is morally or legally obligated to do.
2. [noun] A period of time spent at work or doing a particular task.
3. [noun] Describing a workload as to its idle, working and de-energized periods.
4. [noun] A tax placed on imports or exports; a tariff, customs duty, excise duty.
5. [noun] (obsolete) One's due, something one is owed; a debt or fee.
6. [noun] (obsolete) Respect; reverence; regard; act of respect; homage.
7. [noun] The efficiency of an engine, especially a steam pumping engine, as measured by work done by a certain quantity of fuel; usually, the number of pounds of water lifted one foot by one bushel of coal (94 lbs. old standard), or by 1 cwt. (112 lbs., England, or 100 lbs., United States).
8. [noun] 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.
9. [noun] Work that you are obliged to perform for moral or legal reasons; 'the duties of the job'.
10. [noun] A government tax on imports or exports; 'they signed a treaty to lower duties on trade between their countries'.
