(1):

(v. i.) To come down; to descend.

(2):

(v. t.) To take down, or apart, as a machine.

(3):

(v. t.) To throw or remove from the carriage, or from that on which a thing is mounted; to break the carriage or wheels of, and render useless; to deprive of equipments or mountings; - said esp. of artillery.

(4):

(v. i.) To alight from a horse; to descend or get off, as a rider from his beast; as, the troops dismounted.

(5):

(v. t.) To throw or bring down from an elevation, place of honor and authority, or the like.

(6):

(v. t.) To throw or remove from a horse; to unhorse; as, the soldier dismounted his adversary.