AGISTAGE, or AGISTATION, in Law, the taking-in of other people's cattle to graze at so much per week. The term is peculiarly used for the taking of cattle to feed in the king's forests, as well as for the profits arising from that practice. It is also used, in a metaphorical sense, for any tax, burden, or charge; thus, the tax levied for repairing the banks of Romney Marsh was called agistamentum.

AGISTOR or AGISTATOR, an officer belonging to forests, who has the care of cattle taken in to be grazed, and levies the moneys due on that account. They are generally called quest-takers or gift-takers, and are created by letters patent. Each royal forest has four agisters.