What is the meaning of Unseat?

To dislodge or remove (someone) from a seat, especially on horseback.

1. To remove (someone) from an office or position, especially a political one; to dethrone.

   To remove (someone) from an office or position, especially a political one; to dethrone.

   To cause (something) to be removed or replaced in its role; to displace, to overturn.

   To upset the composure of (someone); to astound, to shock, to unsettle.

   To come off or out of a seat.

   Source: wiktionary.org