(of a book, etc.) to snap shut. Durable storage baskets that add to the beauty and personality of your space, and save up to 80% on carbon emissions. Folden is an adjective that means folded or bent
Phil Foden: One of our own
It is derived from the verb fold and first appeared in middle english in 1435
See more details, examples and related words in oed.
(transitive) to make the proper arrangement (in a thin material) by bending.