n. & v.
n. 1 a slight crease or depression in the skin such as is produced by age. 2 a similar mark in another flexible surface. 3 colloq. a useful tip or clever expedient.
v. 1 tr. make wrinkles in. 2 intr. form wrinkles; become marked with wrinkles.
[ orig. repr. OE gewrinclod sinuous ]