A yard or enclosed space for tilts and tournaments; a (permanent) tilting-ground.

A warrant granted by a military commander to protect a place from pillage. Also: a guard or detachment of soldiers sent to protect the place. Now…

A regiment of guards made up of Irish soldiers, esp. one forming part of a monarch's personal troops or guard. Also in plural. Now historical.

North American. A waterborne body of troops responsible for defending or maintaining control of a tract of water. Now historical and rare.

a guard detailed to cover a foraging party.

see under tilt-yard, n.