galley proof

noun

Printing.

1. 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.

galley proof

noun

1. Often shortened to: galley. 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

Word History and Origins

Origin of galley proof¹

First recorded in 1885–90