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A conduit of pipe, especially one used for the conveyance of water, gas, or petroleum products.
(noun)
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A direct channel by which information is privately transmitted.
(noun)
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A system through which something is conducted, especially as a means of supply: "Farther down the pipeline are three other approaches to vaccine development” ( Boston Globe).
(noun)
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To convey by or as if by a system of pipes.
(verb-transitive)
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To lay a system of pipes through.
(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.