What is the meaning of crease?

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, plication, flexure, crimp, bend
• A slight depression in the smoothness of a surface.
  • usage: "his face has many lines"; "ironing gets rid of most wrinkles"
  • synonyms: wrinkle, furrow, crinkle, seam, line
• A Malayan dagger with a wavy blade.
  • synonyms: kris, creese

verb

• Make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in.
  • usage: "The dress got wrinkled"; "crease the paper like this to make a crane"
  • synonyms: wrinkle, ruckle, crinkle, scrunch, scrunch up, crisp
• Make wrinkled or creased.
  • usage: "furrow one's brow"
  • synonyms: furrow, wrinkle
• Scrape gently.
  • usage: "graze the skin"
  • synonyms: graze, rake
• Become wrinkled or crumpled or creased.
  • usage: "This fabric won't wrinkle"
  • synonyms: rumple, crumple, wrinkle, crinkle