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Related to galley proof: page proof
(Printing, Lithography & Bookbinding) a printer's proof, esp one taken on a long strip of paper from type in a galley, used to make corrections before the matter has been split into pages. Often shortened to: galley
a proof, orig. one set from type in a galley, taken before the material has been made up into pages and usu. printed as a single column of type with wide margins for marking corrections.