Definitions from Wiktionary (Duty)

▸ noun:  (countable, uncountable) That which one is morally or legally obligated to do.
▸ noun:  (uncountable) The state of being at work and responsible for or doing a particular task.
▸ noun:  (countable) A tax placed on imports or exports; a tariff.
▸ noun:  (obsolete) One's due, something one is owed; a debt or fee.
▸ noun:  (obsolete) Respect; reverence; regard; act of respect; homage.
▸ noun:  (engineering) The efficiency of an engine in work done per unit of fuel; particularly, the number of pounds of water which a steam pumping engine can raise one foot by burning one bushel or hundredweight of coal.
▸ noun:  (euphemistic) The act of urination or defecation, especially for a dog.
▸ noun:  A surname.

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