- Create folds and ridges - Wrinkle into folds - Wrinkled; crumpled; furrowed; contracted into ridges and
furrows. - To form or shape into wrinkles or folds, or alternate
ridges and grooves, as by drawing, contraction, pressure, bending, or
otherwise; to wrinkle; to purse up; as, to corrugate plates of iron; to
corrugate the forehead.