"piece of ground," 1517, from plot (q.v.), assimilated to adj. plat "flat," from O.Fr. plat, perhaps from V.L. *plattus, from Gk. platys "flat, wide, broad" (see place (n.)).
Main Entry: plat Pronunciation: 'plat Function: noun Etymology: probably alteration of plot : a plan, map, or chart of a piece of land with present or proposed features (as lots); also: the land represented