foldout

or fold-out

[ fohld-out ]
/ ˈfoʊldˌaʊt /

noun

a page larger than the trim size of a magazine or book, folded one or more times so as not to extend beyond the pages; gatefold.

adjective

that must be unfolded to be used, read, viewed, etc.: a cabinet with a foldout table.

Origin of foldout

First recorded in 1945–50; noun, adj. use of verb phrase fold out

British Dictionary definitions for fold out

foldout
/ (ˈfəʊldˌaʊt) /

noun

printing another name for gatefold