[an-ik-sey-shuh n, -ek-]
  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.

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for de-annexation


  1. the act of annexing, esp territory, or the condition of being annexed
  2. something annexed
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



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.).

Online Etymology Dictionary, © 2010 Douglas Harper