To descend from a height; come or go down.To get off from a horse or other ridden animal; descend or alight, as a rider from the saddle: as, the officer ordered his troops to dismount.To throw or bring down from an elevation, or from a place or post of authority.To throw or bring down from a horse; unhorse: as, the soldier dismounted his adversary.To remove or throw down, as cannon or other artillery from their carriages, or from a parapet or intrenchment; destroy the mountings of, so as to render useless.To remove from a frame, setting, or other mounting: as, to dismount a picture or a jewel.