dismount

Short definition from Wiktionary

Verb

1. 1
   To (cause to) get off (something).
2. 2
   To make (a mounted drive) unavailable for use.
3. 3
   To come down; to descend.
4. 4
   To throw (cannon) off their carriages.

Noun

1. 1
   The act of stepping down from something being ridden, such as a skateboard.
2. 2
   The part of a routine in which the gymnast detaches from an apparatus.