{ A*gist"er, A*gist"or } (&?;), n. [Anglo-Norman agistour.] (Law) (a) Formerly, an officer of the king's forest, who had the care of cattle agisted, and collected the money for the same; -- hence called gisttaker, which in England is corrupted into guest- taker. (b) Now, one who agists or takes in cattle to pasture at a certain rate; a pasturer. Mozley & W.