abdicate

Short definition from Wiktionary

Verb

1. 1
   To disclaim and expel from the family, as a father his child; to disown; to disinherit.
2. 2
   To formally separate oneself from or to divest oneself of.
3. 3
   To depose.
4. 4
   To reject; to cast off; to discard.
5. 5
   To surrender, renounce or relinquish, as sovereign power; to withdraw definitely from filling or exercising, as a high office, station, dignity; to fail to fulfill responsibility for.
6. 6
   To relinquish or renounce a throne, or other high office or dignity; to renounce sovereignty.