Definitions
1.verbTo (cause to) get off (something)."She carefully dismounted from the horse."
2.verbTo make (a mounted drive) unavailable for use.
3.verbTo come down; to descend.
4.verbTo throw (cannon) off their carriages.
5.adjectiveHaving gotten off one's horse, or been removed from its usual mounting, as with a statue off its pedestal, a framed picture from a wall, or a chandelier hanging from a ceiling.