Webster's Revised Unabridged Dictionary · 1913

Dismount

Dismount , intransitive verb

[Prefix dis- + mount: compare Old French desmonter, French démonter.]

1.
To come down; to descend. [Poetic]
But now the bright sun ginneth to dismount. — Spenser
2.
To alight from a horse; to descend or get off, as a rider from his beast; as, the troops dismounted.

Dismount , transitive verb

1.
To throw or bring down from an elevation, place of honor and authority, or the like.
Dismounted from his authority. — Barrow
2.
To throw or remove from a horse; to unhorse; as, the soldier dismounted his adversary.
3.
(Mechanics) To take down, or apart, as a machine.
4.
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.