Definition of "galley proof" []

• Printing A proof taken from composed type before page composition to allow for the detection and correction of errors. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "With the exception of a sheet of galley proof in the collection of Anne Butler Yeats, a version of another poem in canceled proof at Yale University, and a version of a third at Emory University, the manuscripts for the nine “Poems of the 1890s” are in three manuscript notebooks: one entitled “The Rosy Cross."