pucker

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To gather into small wrinkles or folds: puckered my lips; puckered the curtains.
2. v. To become gathered, contracted, and wrinkled.
3. n. A wrinkle or wrinkled part, as in tightly stitched cloth.
4. n. A facial expression in which the lips are tightly pulled together and pushed outward.
5. n. A tart flavor that causes one's lips to pucker: the pucker of lemon.

Century Dictionary and Cyclopedia

1. To draw up or contract into irregular folds or wrinkles; specifically, in sewing, to gather: often followed by up: as, to pucker cloth in sewing.
2. To become irregularly ridged or wrinkled: as, his face puckered up into a smile; the mouth puckers on eating choke-cherries.
3. n. A drawing or gathering into folds or wrinkles; an irregular folding or wrinkling; a collection of irregularly converging ridges or wrinkles.
4. n. A state of flutter, agitation, or confusion.

Wiktionary

1. v. To pinch or wrinkle; to squeeze inwardly, to dimple or fold.
2. n. A fold or wrinkle.
3. n. A state of perplexity or anxiety; confusion; bother; agitation.

GNU Webster's 1913

1. v. To gather into small folds or wrinkles; to contract into ridges and furrows; to corrugate; -- often with up.
2. n. A fold; a wrinkle; a collection of folds.
3. n. Prov. Eng. & Colloq. U. S. A state of perplexity or anxiety; confusion; bother; agitation.

WordNet 3.0

1. v. draw together into folds or puckers
2. v. become wrinkled or drawn together
3. n. an irregular fold in an otherwise even surface (as in cloth)
4. v. to gather something into small wrinkles or folds