an·nex·a·tion \ˌaˌnekˈsāshən, ˌanə̇-, ˌanē-\noun (-s) Etymology:annex + -ation 1.: the act of annexing or state of being annexed < the possibility of cultural annexation > 2.: something that is annexed < defended their annexations with fire and sword — G.B.Shaw > 3.: the union of property with a freehold so as to become a fixture