Noah Webster
Dismount
DISMOUNT, verb intransitive [dis and mount.]
1. To alight from a horse; to descend or get off, as a rider from a beast; as, the officer ordered his troops to dismount
2. To descend from an elevation.
DISMOUNT, verb transitive
1. To throw or remove from a horse; to unhorse; as, the soldier dismounted his adversary.
2. To throw or bring down from any elevation.
3. To throw or remove cannon or other artillery from their carriages; or to break the carriages or wheels, and render guns useless.