noun That which one is morally or legally obligated to do.
Do your duty by me! -No, we don't have a duty to keep you abreast.
noun The state of being at work and responsible for or doing a particular task.
I’m on duty from 6 pm to 6 am.
noun An excise tax; especially, one on imports or exports.
customs duty
noun One's due, something one is owed; a debt or fee.
noun Respect; reverence; regard; act of respect; homage.
noun 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 The act of urination or defecation, especially for a dog.