[v. oh-ver-throh; n. oh-ver-throh]
verb (used with object), overthrew, overthrown, overthrowing.
to depose, as from a position of power; overcome, defeat, or vanquish: to overthrow a tyrant.
to put an end to by force, as a government or institution.
to throw or knock down; overturn; topple: The heavy winds overthrew numerous telephone poles and trees.
to knock down and demolish.
to throw (something) too far.
Baseball. (of a pitcher) to throw too hard, often affecting control or straining the arm.
Archaic. to destroy the sound condition of (the mind).
verb (used without object), overthrew, overthrown, overthrowing.
to throw too far: If I hadn't overthrown, it would have been a sure putout.
the act of overthrowing; state or condition of being overthrown.
deposition from power.
defeat; destruction; ruin.

1300–50; Middle English; see over-, throw

overthrower, noun
preoverthrow, noun
preoverthrow, verb (used with object), preoverthrew, preoverthrown, preoverthrowing.
unoverthrown, adjective

1. conquer, overpower. 4. destroy, raze, level. 11. fall.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
vb , -throws, -throwing, -threw, -thrown
1.  (tr) to effect the downfall or destruction of (a ruler, institution, etc), esp by force
2.  (tr) to throw or turn over
3.  (tr) to throw (something, esp a ball) too far
4.  an act of overthrowing
5.  downfall; destruction
6.  cricket
 a.  a ball thrown back too far by a fielder
 b.  a run scored because of this

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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Word Origin & History

early 14c., "to knock down," from over + throw (q.v.). Figurative sense of "to cast down from power, defeat" is attested from late 14c.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
They team up to form coalitions to overthrow their foes, but they also
  reconcile after a fight.
Yet the overthrow of religion is not a part of the scientific agenda.
Its ability to overthrow the order of things and built a new conceptual
  pictures of the world time and again.
There are opposition figures who are not willing to accept this government and
  are interested in violent overthrow.
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