A angular or rounded shape in a thin material (such as paper) where the material abruptly changes direction, typically back toward itself.
an angular shape made by folding
act of bending a joint; especially a joint between the bones of a limb so that the angle between them is decreased
an angular or rounded shape made by folding; "a fold in the napkin"; "a crease in his trousers"; "a plication on her blouse"; "a flexure of the colon"; "a bend of his elbow"
