주름 (Fold) refers to a bend or crease in a material, often seen in fabrics, paper, or geological formations. In textiles, folds can create texture and shape, enhancing the aesthetic appeal of clothing. In geology, folds occur when layers of rock are compressed, resulting in various formations like hills and valleys. In art and design, folds are used to create depth and dimension. Techniques such as origami utilize folds to transform flat sheets into intricate shapes. Understanding folds is essential in various fields, including fashion design, architecture, and even mathematics, where they can represent complex structures and patterns.