A small furrow, ridge, or crease on a normally smooth surface, caused by crumpling, folding, or shrinking. A line or crease in the skin, as from age. A clever trick, method, or device, especially one that is new and different. A problem or imperfection; a fault: The report had to be revised because of a few wrinkles. To make wrinkles or a wrinkle in. To draw up into wrinkles; pucker: wrinkled her nose in disdain. To form wrinkles.