the act or procedure of folding.

the state or quality of being folded; a fold.

Surgery .

the folding in and suturing of tucks, so as to tighten weakened or stretched tissue.

the folding of an organ, as a section of the intestine, and the attaching of it to another organ or tissue.

noun

crease , crimp , crinkle , crumple , pleat , plica , pucker , rimple , ruck , rumple , wrinkle