wrinkle

American Heritage® Dictionary of the English Language, Fourth Edition

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

Century Dictionary and Cyclopedia

1. n. A slight ridge in or raised line on a surface caused by contraction, folding, puckering, or rumpling; a line of corrugation, generally one of a series, either regularly or irregularly disposed; a crease: as, wrinkles in a garment, or in an old man's face; wrinkles (small corrugations) in a rock.
2. To form wrinkles in: contract, fold, or pucker into small ridges and furrows or creases; corrugate; crease.
3. To become contracted into wrinkles; shrink into furrows and ridges; be marked with wrinkles.
4. n. A short pithy piece of information or advice; a valuable hint; a bit of useful knowledge or instruction; a good idea; a trick; a point; a notion; a device.

Wiktionary

1. n. A small furrow, ridge or crease in an otherwise smooth surface.
2. n. A line or crease in the skin, especially when caused by age or fatigue.
3. n. A fault, imperfection or bug especially in a new system or product; typically, they will need to be ironed out.
4. v. transitive To make wrinkles in; to cause to have wrinkles.
5. v. intransitive To pucker or become uneven or irregular.

GNU Webster's 1913

1. n. Local, U. S. A winkle.
2. n. A small ridge, prominence, or furrow formed by the shrinking or contraction of any smooth substance; a corrugation; a crease; a slight fold
3. n. hence, any roughness; unevenness.
4. n. colloq. A notion or fancy; a whim.
5. v. To contract into furrows and prominences; to make a wrinkle or wrinkles in; to corrugate.
6. v. Hence, to make rough or uneven in any way.
7. v. To shrink into furrows and ridges.

WordNet 3.0

1. v. become wrinkled or crumpled or creased
2. n. a slight depression in the smoothness of a surface
3. v. make wrinkled or creased
4. n. a minor difficulty
5. v. make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in
6. v. gather or contract into wrinkles or folds; pucker.
7. n. a clever method of doing something (especially something new and different)