Folding

Fold or folding may refer to:

fold (geology)
folding, in poker, is the act of withdrawing from a hand rather than meeting the bet
folding ingredients together is a cooking technique
protein folding
origami, the art of paper folding
pattern welding, the folding of metal
confining animals in a fold, a temporary structure of lightweight portable hurdle fencing.
in computer programming, folds are higher-order functions that process a structure in some order
in Mathematics the fold catastrophy is one most basic objects in Singularity theory.