intransitive. To become wrinkled or shrivelled; to form wrinkles or small folds. Also with up.

Of persons, the face, etc.: To become creased or puckered; to assume or undergo marking with wrinkles, creases, or lines; to crease.

intransitive. To knit the brows; to look angry. Also of the face or forehead: To fall into wrinkles, become wrinkled. Obsolete.