plate mark noun2 •A legal emblem stamped into articles made from precious metals such as gold and silver to indicate the value of the metal.Last autumn a gentleman who is well acquainted with plate marks saw this plate, and informed the owner that it was spurious. — 1883 •A mark made on paper by the edge of an intaglio plate during printing.All four beveled edges of the plate should correspond with the embossed plate mark on the back of the print. — 1976 formsplate marks
