What does agist mean?
The definition of agist
A*gist”, v. t.
Etym: [OF. agister; à (L. ad) + gister to assign a lodging, fr. giste lodging, abode, F. gîte, LL. gistum, gista, fr. L. jacitum, p. p. of jac to lie: cf. LL. agistare, adgistare. See Gist.] (Law)

To take to graze or pasture, at a certain sum; — used originally of the feeding of cattle in the king’s forests, and collecting the money for the same. Blackstone.