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bypass

[bahy-pas, -pahs] /ˈbaɪˌpæs, -ˌpɑs/
noun
1.
a road enabling motorists to avoid a city or other heavy traffic points or to drive around an obstruction.
2.
a secondary pipe or other channel connected with a main passage, as for conducting a liquid or gas around a fixture, pipe, or appliance.
3.
Electricity, shunt (def 9).
4.
a surgical procedure in which a diseased or obstructed hollow organ is temporarily or permanently circumvented.
verb (used with object), bypassed or (Rare) bypast; bypassed or bypast; bypassing.
5.
to avoid (an obstruction, city, etc.) by following a bypass.
6.
to cause (fluid or gas) to follow a secondary pipe or bypass.
7.
to neglect to consult or to ignore the opinion or decision of:
He bypassed the foreman and took his grievance straight to the owner.
Also, by-pass.
Origin
1840-1850
1840-50; apparently back formation from by-passage; see by1 (adj.), passage1
Related forms
bypasser, by-passer, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for by-pass

bypass

/ˈbaɪˌpɑːs/
noun
1.
a main road built to avoid a city or other congested area
2.
any system of pipes or conduits for redirecting the flow of a liquid
3.
a means of redirecting the flow of a substance around an appliance through which it would otherwise pass
4.
(surgery)
  1. the redirection of blood flow, either to avoid a diseased blood vessel or in order to perform heart surgery See coronary bypass
  2. (as modifier) bypass surgery
5.
(electronics)
  1. an electrical circuit, esp one containing a capacitor, connected in parallel around one or more components, providing an alternative path for certain frequencies
  2. (as modifier) a bypass capacitor
verb (transitive) -passes, -passing, -passed, -past
6.
to go around or avoid (a city, obstruction, problem, etc)
7.
to cause (traffic, fluid, etc) to go through a bypass
8.
to proceed without reference to (regulations, a superior, etc); get round; avoid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for by-pass
bypass
1848, of certain pipes in a gasworks, from by + pass. First used 1922 for "road for the relief of congestion;" fig. sense is from 1928. The heart operation was first so-called 1957.
Online Etymology Dictionary, © 2010 Douglas Harper
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by-pass in Medicine

bypass by·pass (bī'pās')
n.

  1. A passage created surgically to divert the flow of blood or other bodily fluid or to circumvent an obstructed or diseased organ.

  2. A surgical procedure to create such a channel.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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by-pass in Science
bypass
  (bī'pās')   

A passage created surgically to divert the flow of blood or other bodily fluid or to circumvent an obstructed or diseased organ.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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