pleat

This term describes a specific type of structural fold where fabric is doubled back on itself, creating a rhythmic, accordion-like effect. It differs from a simple crease or a random wrinkle by its intentionality and geometric regularity, often used to control volume or add decorative texture to garments. In a technical sense, the word encompasses both the physical result of the folding process and the action of creating those folds. While it is most common in tailoring and dressmaking, it evokes a sense of precision and architectural shaping of soft materials.