Definition of "gatefold" [gatefold]

• A foldout, especially one that opens to double the page size. (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.

• "A gatefold is a page which requires unfolding to view--like a Playboy centerfold--and is usually an extension of a normal page."
• "It is also reproduced, along with an accompanying gatefold featuring the New York Times 'page one story about the sale, at the center of 50 Years at Pace's splashy catalogue, which includes more than 250 full color illustrations, and, given its heft and embossed title, resembles a tombstone."
• "Issue #39 was our special holofoil gatefold cover special edition."