To mount guard

Mount Mount, v. t. 1. To get upon; to ascend; to climb; as, to mount the pulpit and deliver a sermon. [1913 Webster]

Shall we mount again the rural throne? --Dryden. [1913 Webster]

2. To place one's self on, as a horse or other animal, or anything that one sits upon; to bestride. [1913 Webster]

3. To cause to mount; to put on horseback; to furnish with animals for riding; to furnish with horses. ``To mount the Trojan troop.'' --Dryden. [1913 Webster]

4. Hence: To put upon anything that sustains and fits for use, as a gun on a carriage, a map or picture on cloth or paper; to prepare for being worn or otherwise used, as a diamond by setting, or a sword blade by adding the hilt, scabbard, etc.; as, to mount a picture or diploma in a frame [1913 Webster]

5. To raise aloft; to lift on high. [1913 Webster]

What power is it which mounts my love so high? --Shak. [1913 Webster]

Note: A fort or ship is said to mount cannon, when it has them arranged for use in or about it. [1913 Webster]

{To mount guard} (Mil.), to go on guard; to march on guard; to do duty as a guard.

{To mount a play}, to prepare and arrange the scenery, furniture, etc., used in the play. [1913 Webster]