What is the meaning of crimp?

noun

• An angular or rounded shape made by folding.
  • usage: "a fold in the napkin"; "a crease in his trousers"; "a plication on her blouse"; "a flexure of the colon"; "a bend of his elbow"
  • synonyms: fold, crease, plication, flexure, bend
• Someone who tricks or coerces men into service as sailors or soldiers.
  • synonyms: crimper
• A lock of hair that has been artificially waved or curled.

verb

• Make ridges into by pinching together.
  • synonyms: pinch
• Curl tightly.
  • usage: "crimp hair"
  • synonyms: crape, frizzle, frizz, kink up, kink