a proof, originally one set from type in a galley, taken before the material has been made up into pages and usually printed as a single column of type with wide margins for marking corrections.
Origin of galley proof
First recorded in 1885–90
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Examples from the Web for galley proof
Historical Examples of galley proof
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 pagesOften shortened to: galley
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012