a braid of hair worn hanging down behind.
a file or line, especially of people waiting their turn.
Computers. a FIFO-organized sequence of items, as data, messages, jobs, or the like, waiting for action.
verb (used without object), verb (used with object), queued, queuing.
to form in a line while waiting (often followed by up ).
Computers. to arrange (data, jobs, messages, etc.) into a queue.

1585–95; < Middle French < Latin cauda, cōda tail

queuer, noun

cue, queue, Kew.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
queue (kjuː)
1.  a line of people, vehicles, etc, waiting for something: a queue at the theatre
2.  computing a list in which entries are deleted from one end and inserted at the other
3.  a pigtail
4.  jump the queue See queue-jump
vb (often foll by up) , queues, queuing, queueing, queued
5.  to form or remain in a line while waiting
6.  computing to arrange (a number of programs) in a predetermined order for accessing by a computer
[C16 (in the sense: tail); C18 (in the sense: pigtail): via French from Latin cauda tail]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

15c., "tail of a beast" (heraldic term), from Fr. queue "a tail," from O.Fr. cue "tail," from L. coda (dialectal variant of cauda) "tail," of unknown origin. The M.E. metaphoric extension to "line of dancers" led to extended sense of "line of people, etc." (1837). Also used 18c. in sense of "braid of
hair" (first attested 1748). The verb meaning "to stand in a line" is recorded from 1927 (implied in queuing). Churchill is said to have coined Queuetopia (1950), to describe Britain under Labour or Socialist rule.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Whenever possible, purchase tickets or make reservations in advance to avoid
  spending a lot of time in queues.
Guests spend a lot of time walking the four main parks in addition to standing
  in long, winding attraction queues.
Part of the stress of air travel is getting to the airport with ample time for
  the long queues at.
These taxis can be reserved through your hotel, hailed on city streets or
  obtained through citywide taxi queues.
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