wrinkle

Short definition from Wiktionary

Noun

1. 1
   A small furrow, ridge or crease in an otherwise smooth surface.
2. 2
   A line or crease in the skin, especially when caused by age or fatigue.
3. 3
   A fault, imperfection or bug especially in a new system or product; typically, they will need to be ironed out.
4. 4
   A twist on something existing; a novel difference.
5. 5
   A winkle

Verb

1. 1
   To make wrinkles in; to cause to have wrinkles.
2. 2
   To pucker or become uneven or irregular.
3. 3
   To develop irreversibly wrinkles; to age.
4. 4
   To sneer (at).

Proper noun

1. 1
   A surname.