What is Agist?

Legal Definition
In contrads. The taking of other men's cattle on one's own ground at a certain rate. 2 Inst. 643; 4 Inst. 293.
-- Bouviers Law Dictionary
Legal Definition
In ancient law. To take in and feed the cattle of strangers in the king's forest, and to collect the money due for the same to the king's use. Spelman; Cowell. In modern law. To take in cattle to feed, or pasture, at a certain rate of compensation. See Agistment.
-- Black's Law Dictionary