crin‧kle¹ /ˈkrɪŋkəl/ (also crinkle up) verb [intransitive and transitive]
[Date: 1300-1400; Origin: Perhaps from Old English cringan; ⇒ cringe]

1. if you crinkle part of your face, or if it crinkles, you move it so that small lines appear on it:
His mouth crinkled into a smile.
He smiled boyishly, crinkling his eyes.
Her face crinkled up in disgust.

2. to become covered with small folds, or make something do this:
The heat was beginning to make the cellophane crinkle.
—crinkled adjective:
The pages were brown and crinkled.

[TahlilGaran] Dictionary of Contemporary English ▲