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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Computing Dictionary

queue definition

A first-in first-out data structure used to sequence objects. Objects are added to the tail of the queue ("enqueued") and taken off the head ("dequeued").
For example, an operating system might use a queue to serialise concurrent demands for a resource such as a printer, processor or communications channel. Users might place files on a print queue and a background process or "demon" would take them off and print them. Another common use is to pass data between an interrupt handler and a user process.

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
We entered through a private gate, which meant no queue or worries about
One day while standing in a bus queue we were discussing parts of England we
  should like to visit.
I'll put those questions in the queue for now, with the promise to get back to
  them in the order they were received.
Small logs were used to guide the ticket buyers as they form a queue.
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