9 Grammatical Pitfalls


[uh b-struhk-shuh n] /əbˈstrʌk ʃən/
something that obstructs, blocks, or closes up with an obstacle or obstacles; obstacle or hindrance:
obstructions to navigation.
an act or instance of obstructing.
the state of being obstructed.
the delaying or preventing of business before a deliberative body, especially a legislative group, by parliamentary contrivances.
Origin of obstruction
1525-35; < Latin obstructiōn- (stem of obstructiō) barrier. See obstruct, -ion
Related forms
preobstruction, noun
1. barrier, bar, impediment. See obstacle. 3. stoppage.
1, 3. encouragement. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for obstruction
  • Every advance was followed by slippage and obstruction before, at long last, the job was done.
  • In the next moment, the obstruction in question shot out of the line with fire hose ferocity.
  • Keep the exhausts and intakes free from obstruction.
  • The goal is to study the ebb and flow of the shower free of any cloud obstruction and light pollution.
  • He must be able to stop his train when he sees an obstruction ahead without hitting the obstruction.
  • Voiding symptoms can be caused by an obstruction in the urinary tract.
  • But obstruction and vituperation in all cases, even those you promote, is counterproductive and to be derided.
  • The obstruction might be in the radiator itself, in the water pump, or in the hose connections.
  • The break is believed to have been caused by the propeller striking some submerged obstruction.
  • The sound is caused by water's flowing rapidly through a narrow restriction or past an obstruction.
British Dictionary definitions for obstruction


a person or thing that obstructs
the act or an instance of obstructing
delay of business, esp in a legislature by means of procedural devices
(sport) the act of unfairly impeding an opposing player
the state or condition of being obstructed
Derived Forms
obstructional, adjective
obstructionally, adverb
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 obstruction

1530s, from Latin obstructionem (nominative obstructio) "an obstruction, barrier, a building up," noun of action from past participle stem of obstruere "build up, block, block up, build against, stop, bar, hinder," from ob "against" (see ob-) + struere "to pile, build" (see structure (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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obstruction in Medicine

obstruction ob·struc·tion (əb-strŭk'shən, ŏb-)

  1. The blocking of a body passage, as by clogging or stricture.

  2. The state of being obstructed.

  3. Something, such as a mass or stricture, that obstructs.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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