pipeline

[pahyp-lahyn]
noun
1.
a long tubular conduit or series of pipes, often underground, with pumps and valves for flow control, used to transport crude oil, natural gas, water, etc., especially over great distances.
2.
a route, channel, or process along which something passes or is provided at a steady rate; means, system, or flow of supply or supplies: Freighters and cargo planes are a pipeline for overseas goods.
3.
a channel of information, especially one that is direct, privileged, or confidential; inside source; reliable contact.
verb (used with object), pipelined, pipelining.
4.
to convey by or as if by pipeline: to pipeline oil from the far north to ice-free ports; to pipeline graduates into the top jobs.
Idioms
5.
in the pipeline,
a.
Informal. in the process of being developed, provided, or completed; in the works; under way.
b.
Government Informal. (of funds) authorized but not spent.

Origin:
1855–60; pipe1 + line1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pipeline (ˈpaɪpˌlaɪn)
 
n
1.  a long pipe, esp underground, used to transport oil, natural gas, etc, over long distances
2.  a medium of communication, esp a private one
3.  in the pipeline in the process of being completed, delivered, or produced
 
vb
4.  to convey by pipeline
5.  to supply with a pipeline

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

pipeline
1873, "continuous line of pipes," from pipe + line. Fig. sense of "channel of communication" is from 1921; surfer slang meaning "hollow part of a large wave" is attested by 1963.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences for pipelines
Vessels are loaded using either excavators and conveyor belts or pipelines.
The guerrillas also destroyed oil pipelines creating major ecological disasters.
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