overturn

[v. oh-ver-turn; n. oh-ver-turn]
verb (used with object)
1.
to destroy the power of; overthrow; defeat; vanquish.
2.
to turn over on its side, face, or back; upset: to overturn a vase.
verb (used without object)
3.
to turn on its side, face, or back; capsize: The boat overturned during the storm.
noun
4.
the act of overturning.
5.
the state of being overturned.

Origin:
1175–1225; Middle English; see over-, turn

overturnable, adjective


1. conquer. 2. See upset.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
overturn
 
vb
1.  to turn or cause to turn from an upright or normal position
2.  (tr) to overthrow or destroy
3.  (tr) to invalidate; reverse: the bill was passed in the Commons but overturned in the Lords
 
n
4.  the act of overturning or the state of being overturned

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

overturn
early 13c., of a wheel, "to rotate, roll over," from over + turn (v.). Attested from c.1300 in general trans. sense "to throw over violently;" fig. meaning "to ruin, destroy" is from late 14c. Of judicial decisions, "to reverse," it is attested from 1969.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
They usually try to explain details that the original theories didn't cover,
  not overturn them completely.
Colleges also still have a chance to overturn the rule.
The law he wants to overturn has also hobbled libraries' efforts to digitize
  and share books, films, and music.
Indeed, as is implied by the form of the statement above, every overturn
  furnishes an example.
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