Fold under意思

"Fold under" is a term commonly used in sewing and garment construction. It refers to the process of folding a piece of fabric or material backward so that the raw edge is hidden and the fabric lies flat. This technique is often used to finish edges on curtains, hems of garments, and other areas where a clean, finished look is desired.

For example, when making a curtain, you might fold the top edge under by a certain width (such as 2 inches) to create a clean finish that doesn't require hemming or additional edging. The folded-under portion helps to reinforce the edge and prevent fraying.

In a broader sense, "fold under" can also be used metaphorically to mean to reduce the size or scope of something by folding or bending it.