Abdication

noun

1. The act of disowning or disinheriting a child.
2. The act of abdicating; the renunciation of a high office, dignity, or trust, by its holder.
3. The voluntary renunciation of sovereign power

   "abdication of the throne, government, power, authority"

4. The renunciation of interest in a property or a legal claim; abandonment.
5. The action of being deposed from the seat of power.