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barrier

[bar-ee-er] /ˈbær i ər/
noun
1.
anything built or serving to bar passage, as a railing, fence, or the like:
People may pass through the barrier only when their train is announced.
2.
any natural bar or obstacle:
a mountain barrier.
3.
anything that restrains or obstructs progress, access, etc.:
a trade barrier.
4.
a limit or boundary of any kind:
the barriers of caste.
5.
Physical Geography. an antarctic ice shelf or ice front.
7.
barriers, History/Historical. the palisade or railing surrounding the ground where tourneys and jousts were carried on.
8.
Archaic. a fortress or stockade.
Origin
1275-1325
1275-1325; Middle English < Middle French barriere (barre bar1 + -iere < Latin -āria -ary); replacing Middle English barrere < Anglo-French < Medieval Latin barrera
Synonyms
1. palisade, wall. 1–3. obstruction, hindrance, impediment. See bar1 .
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for barriers
  • Meanwhile, as sea level rise approaches two feet, the barriers might simply spend more time closed.
  • One of the barriers to publishing a story about diamond growers is that almost everyone involved is touchy about secrecy.
  • Inefficient central power generation is protected by a glacier of artificial barriers.
  • So the researchers have been studying what reproductive barriers or ecological conditions are in play that prevent hybridization.
  • As ice barriers melt, species that have been separated for millennia can comingle once again.
  • barriers to progress are high population growth, electricity shortages, and inefficiency in key sectors.
  • But the mosquito barriers are only as good as the fabric from which they're made.
  • Pollution and physical barriers to root growth promote loss of urban tree cover.
  • Some photographers see their cameras as barriers between them and their subjects.
  • As she broke through these barriers, one after another, her career advanced.
British Dictionary definitions for barriers

barrier

/ˈbærɪə/
noun
1.
anything serving to obstruct passage or to maintain separation, such as a fence or gate
2.
anything that prevents or obstructs passage, access, or progress a barrier of distrust
3.
anything that separates or hinders union a language barrier
4.
  1. an exposed offshore sand bar separated from the shore by a lagoon
  2. (as modifier) a barrier beach
5.
(sometimes capital) that part of the Antarctic icecap extending over the sea
Word Origin
C14: from Old French barriere, from barrebar1
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 barriers
barrier
early 14c., from O.Fr. barriere "obstacle, gatekeeper," from barre "bar" (see bar (1)). First record of barrier reef is from 1805.
Online Etymology Dictionary, © 2010 Douglas Harper
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barriers in Medicine

barrier bar·ri·er (bār'ē-ər)
n.

  1. A structure, such as a fence, built to bar passage.

  2. A boundary or limit.

  3. An obstacle or impediment.

  4. Something that separates or holds apart.

  5. Something immaterial that obstructs or impedes behavior.

  6. A physical or biological factor that limits the migration, interbreeding, or free movement of individuals or populations.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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10
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