Noun

(label) The power to enforce rules or give orders.

* 1883 , (Howard Pyle), (The Merry Adventures of Robin Hood)

But in the meantime Robin Hood and his band lived quietly in Sherwood Forest, without showing their faces abroad, for Robin knew that it would not be wise for him to be seen in the neighborhood of Nottingham, those in authority being very wroth with him.

(label) Persons in command; specifically, government.

*{{quote-book, year=1927, author= F. E. Penny

, chapter=4, title= Pulling the Strings , passage=The case was that of a murder. It had an element of mystery about it, however, which was puzzling the authorities . A turban and loincloth soaked in blood had been found; also a staff.}}

* {{quote-magazine, date=2013-08-10, volume=408, issue=8848, magazine=(The Economist)

, title= Legal highs: A new prescription , passage=No sooner has a [synthetic] drug been blacklisted than chemists adjust their recipe and start churning out a subtly different one. These “legal highs” are sold for the few months it takes the authorities to identify and ban them, and then the cycle begins again.}}

(label) A person accepted as a source of reliable information on a subject.

* 1930 September 18, Albert Einstein, as quoted in Albert Einstein: Creator and Rebel (1988) by Banesh Hoffman

To punish me for my contempt of authority', Fate has made me an ' authority myself.

Noun

(duties)

That which one is morally or legally obligated to do.

:

*1805 , 21 October,

*:England expects that every man will do his duty .

*

*:Captain Edward Carlisle; he could not tell what this prisoner might do. He cursed the fate which had assigned such a duty , cursed especially that fate which forced a gallant soldier to meet so superb a woman as this under handicap so hard.

*{{quote-book, year=1959, author=(Georgette Heyer), title=(The Unknown Ajax), chapter=1

, passage=Charles had not been employed above six months at Darracott Place, but he was not such a whopstraw as to make the least noise in the performance of his duties when his lordship was out of humour.}}

*{{quote-magazine, date=2013-08-10, volume=408, issue=8848, magazine=(The Economist), author=Lexington

, title= Keeping the mighty honest , passage=British journalists shun complete respectability, feeling a duty to be ready to savage the mighty, or rummage through their bins. Elsewhere in Europe, government contracts and subsidies ensure that press barons will only defy the mighty so far.}}

A period of time spent at work or doing a particular task.

:

Describing a workload as to its idle, working and de-energized periods.

A tax placed on imports or exports; a tariff.

(lb) One's due, something one is owed; a debt or fee.

*1526 , (William Tyndale), trans. Bible , (w) XX:

*:Take that which is thy duty , and goo thy waye.

(lb) Respect; reverence; regard; act of respect; homage.

*(William Shakespeare) (c.1564–1616)

*:my duty to you

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).