Definitions
1.nounThat which one is morally or legally obligated to do."We don't have a duty to keep you here."
2.nounThe state of being at work and responsible for or doing a particular task."I’m on duty from 6 pm to 6 am."
3.nounA tax placed on imports or exports; a tariff.
4.nounOne's due, something one is owed; a debt or fee.
5.nounRespect; reverence; regard; act of respect; homage.
6.nounThe 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).