bend (something flexible and relatively flat) over on itself so that one part of it covers another
Sam folded up the map
cover or wrap something in (a soft or flexible material)
a bag was folded around the book
(of a piece of furniture or equipment) able to be bent or rearranged into a flatter or more compact shape, typically in order to make it easier to store or carry
a folding chair
shut (livestock) in a fold