vi.

1. 下车；下马[（+from）]

vt.

1. 使下马；使掉下马
   The knight dismounted his opponent.

   骑士将他的敌手打下马。

2. （从底座上）卸下
   dismount a gun from the gun carriage

   从炮架上卸下大炮

3. 拆开（机器等）

n.

1. 下车；下马[U]

v.

1. get off a horse, bicycle, etc.
2. remove (something) from its support.
3. Computing  make (a disk or disk drive) unavailable for use.