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[suhk-shuh n] /ˈsʌk ʃən/
the act, process, or condition of sucking.
the force that, by a pressure differential, attracts a substance or object to the region of lower pressure.
the act or process of producing such a force.
verb (used with object)
to draw out or remove by aspiration.
Origin of suction
1605-15; < Late Latin sūctiōn- (stem of sūctiō) a sucking, equivalent to Latin sūct(us) (past participle of sūgere to suck) + -iōn- -ion
Related forms
suctional, adjective
nonsuction, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for suction
  • Many of them could resist the suction of even our industrial-strength vacuum cleaner.
  • Each is fitted with a roof for shade, a large motor on deck and a huge suction pipe running from the stern into the water.
  • Thanks guys, you have made the comments suction as interesting as the article itself.
  • One of the squirrels on my garden did good enough acrobatics to get to the feeder suction-cupped on the window.
  • But if you want to suck up, don't apply suction to lower-middle management, which is who drinks white wine.
  • If there is a worm in the fluid it is drawn towards the hole and held in place by the suction.
  • BP is keeping mum, but it does say that the plume of leaking oil looks significantly different now that suction is being applied.
  • The torrent loach uses suction cups to hold its position.
  • suction might have helped it contend with agile prey such as sharks, they observe.
  • If the vacuum or suction thus created is great enough, water will rise up through the straw.
British Dictionary definitions for suction


the act or process of sucking
the force or condition produced by a pressure difference, as the force holding a suction cap onto a surface
the act or process of producing such a force or condition
Derived Forms
suctional, adjective
Word Origin
C17: from Late Latin suctiō a sucking, from Latin sūgere to suck
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 suction

1620s, from Late Latin suctionem (nominative suctio), noun of action from past participle stem of Latin sugere "to suck" (see suck).

Online Etymology Dictionary, © 2010 Douglas Harper
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suction in Science
  1. A force acting on a fluid caused by difference in pressure between two regions, tending to make the fluid flow from the region of higher pressure to the region of lower pressure.

  2. The act of reducing pressure to create such a force, as by the use of a pump or fan.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for suction

suck up to

verb phrase

To flatter and cajole someone; curry favor with someone; brown-nose, suck ass: He gets ahead by sucking up to the mayor/ They are boss kisser-uppers. They kiss up to the boss (entry form 1860+, variant 1990s+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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