GNU Dico
From WordNet dictionary, version 3.0:
crease
n. 1. an angular or rounded shape made by folding; "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
2. a slight depression in the smoothness of a surface; "his face has many lines"; "ironing gets rid of most wrinkles"
Synonyms: wrinkle, furrow, crinkle, seam, line
3. a Malayan dagger with a wavy blade
Synonyms: kris, creese
v. 1. make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; "The dress got wrinkled"; "crease the paper like this to make a crane"
Synonyms: wrinkle, ruckle, crinkle, scrunch, scrunch up, crisp
2. make wrinkled or creased; "furrow one's brow"
Synonyms: furrow, wrinkle
3. scrape gently; "graze the skin"
Synonyms: graze, rake
4. become wrinkled or crumpled or creased; "This fabric won't wrinkle"
Synonyms: rumple, crumple, wrinkle, crinkle