Definitions for "Page proofs"
Proofs in the form that the final pages will appear (also known as galley proofs).
Proofs that have been composed into pages.
Printed out typeset material that looks just like the final book pages. In page proofs figures and other displays are where they will appear in the final book. Page proofs contain running heads and page numbers, and can be used for indexing.
Printouts or photocopies showing each page with text and figures in place.
Initial impression of a page pulled for checking purposes before the entire job is run.