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==Origin==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], from Anglo-French ''coverfeu'', [[signal]] given to bank the [[hearth]] fire, curfew, from ''coverir'' to cover + ''fu'', ''feu'' fire, from [[Latin]] ''focus'' [[hearth]]. It was also used to [[describe]] the time of blowing out all lamps and candles.
*[http://en.wikipedia.org/wiki/14th_century 14th Century]
==Definitions==
*1: the sounding of a bell at evening
*2a : a regulation enjoining the withdrawal of usually specified [[persons]] (as [[juveniles]] or [[military]] personnel) from the streets or the closing of [[business]] establishments or places of assembly at a stated hour
:b : a signal to announce the beginning of a curfew
:c : the hour at which a curfew becomes effective
:d : the period during which a curfew is in effect
==Description==
A '''curfew''' is an order specifying a [[time]] after which certain regulations apply. Examples:

*An order by a [[government]] for certain persons to return [[home]] daily before a certain time. It can be imposed to maintain public order (such as those after the [http://en.wikipedia.org/wiki/Northeast_Blackout_of_2003 Northeast Blackout of 2003], the [http://en.wikipedia.org/wiki/2005_civil_unrest_in_France 2005 civil unrest in France], the [http://en.wikipedia.org/wiki/2010_Chile_earthquake 2010 Chile earthquake] and [http://en.wikipedia.org/wiki/2011_Egyptian_revolution 2011 Egyptian revolution]), or suppress targeted groups. Curfews have long been directed at certain [[groups]] in many cities or states, such as Japanese-American university students on the West Coast of the United States during [[World War II]], African-Americans in many towns during the time of [http://en.wikipedia.org/wiki/Jim_Crow_laws Jim Crow laws], or people younger than a certain age (usually within a few years either side of 18) in many towns of the United States since the 1980s; see below.
*An order by the legal guardians of a [[teenager]] to return home by a specific time, usually in the evening or night. This may apply daily, or vary with the day of the week, i.e., if the minor has to go to [[school]] the next day.
*A daily requirement for guests to return to their [http://en.wikipedia.org/wiki/Hostel hostel] before a specified time, usually in the evening or night.
*In baseball, a time after which a game must end, or play be suspended. For example, in the American League the curfew rule for many years decreed that no inning could begin after 1 am local time (with the exception of international games).
*In aeronautics, [http://en.wikipedia.org/wiki/Night_flying_restrictions night flying restrictions] may restrict aircraft operations over a defined period in the nighttime, to limit the disruption of aircraft [[noise]] on the [[sleep]] of nearby residents. A notable example are the London airports of Heathrow, Gatwick and Stansted, which operate under the Quota Count system.

[[Category: Law]]