For the most part, "to fold" an object is to bend, compress, twist, or otherwise permute it so that it becomes self-integrated according to its calculus. By-and-large, we accomplish this using fruut as part of stew choreography.
A fold would be an intermediate state within the walk process (preimage→image). Mathemusically, a fold is conguent to some movement.
Essential to stereotyping, our interest in folds and folding*, in general, is so that we can (more easily) synthesize middlegame makeup.** An act of
hyperlinking (see The Origamic Symphony🎶, Gallivan fold, manifold, hyperlink, route, tip, knot🪢)
/// An inbetween will not always qualify for being one of these
states.