Real Dictionary

wrinkle
Wrinkles are lines which form on someone's face as they grow old.
verb: When someone's skin wrinkles or when something wrinkles it, lines start to form in it because the skin is getting old or damaged.

wrinkle in American English 1
a small ridge or furrow in a normally smooth surface, caused by contraction, crumpling, folding, etc.
to be or become wrinkled
to form a wrinkle or wrinkles in, as by contracting; pucker; crease
intransitive verb: to become wrinkled
noun: a small furrow or crease in the skin, esp. of the face, as from aging or frowning
transitive verb: to form wrinkles in; corrugate; crease

wrinkle in American English 2
a clever or novel trick, idea, or device
noun: an ingenious trick or device; a clever innovation

wrinkle in British English 1
noun: a slight ridge in the smoothness of a surface, such as a crease in the skin as a result of age
verb: to make or become wrinkled, as by crumpling, creasing, or puckering

wrinkle in British English 2
noun: a clever or useful trick, hint, or dodge