vt.

1. 使從座位上（或馬背上）摔下
   The horse kicked and reared, unseating its rider.

   馬猛踢一下用後腿站立，將騎馬人摔了下來。

2. 剝奪……的席位；使下臺（或退職，退位）
   The opposition tried to unseat the government.

   反對黨試圖推翻政府。

v.

1. cause to fall from a saddle or seat.
2. remove from a position of power or authority.