pleat

A fold in cloth made by doubling the material upon itself and then pressing or stitching it into place.

To press or arrange in pleats.

See plait.

A fold in the fabric of a garment, as a part of the design of the garment, with the purpose of adding controlled fullness or taking up excess fabric. There are many types of pleats, differing in their construction and appearance.

To form one or more pleats in a piece of fabric or a garment.