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annexation

[an-ik-sey-shuh n, -ek-]
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noun
  1. the act or an instance of annexing, or adding to something larger, especially the incorporation of new territory into the domain of a city, country, or state.
  2. the fact of being annexed: Annexation of the two parts of the Bronx in 1874 and 1895 gave New York City the last of its five boroughs.
  3. something annexed: Victory in battle resulted in territorial annexations that remained difficult to govern.
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Origin of annexation

1605–15; < Medieval Latin annexātiōn- (stem of annexātiō), equivalent to annexāt(us) joined to (past participle of annexāre; see annex, -ate1) + -iōn- -ion
Related formsan·nex·a·tion·al, adjectivean·ti·an·nex·a·tion, adjectivede·an·nex·a·tion, nounnon·an·nex·a·tion, nounpro·an·nex·a·tion, adjectivere·an·nex·a·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for de-annexation

annexation

noun
  1. the act of annexing, esp territory, or the condition of being annexed
  2. something annexed
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Derived Formsannexational, adjectiveannexationism, nounannexationist, noun
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

Word Origin and History for de-annexation

annexation

n.

1620s, from Medieval Latin annexiationem (nominative annexatio) "action of annexing," noun of action from past participle stem of annexare (see annex). The Middle English noun form was annexion "union; joining; territory acquired" (mid-15c.).

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Online Etymology Dictionary, © 2010 Douglas Harper