adjective
Designed to fold
noun
The action of folding; a fold.
The keeping of sheep in enclosures on arable land, etc.
(computing, programming) Code folding: a source code display technique that can hide the contents of methods, classes, etc. for easier navigation.
(geology) the deformation of the Earth's crust in response to slow lateral compression.
(slang) Paper money, as opposed to coins.
verb
present participle and gerund of fold