to contract the eyebrows to express displeasure, worry, or deep thought

a fold or wrinkle in fabric, paper, or skin

to knit the brows or scowl, typically expressing worry, displeasure, or concentration

a physical crease, pleat, or ridge in a surface such as fabric, skin, or geological layers

covered in small folds or creases, typically describing clothing, paper, or skin

a crease, wrinkle, or fold in a material such as cloth, paper, or skin

to crumple; to wrinkle

to develop wrinkles; to shrivel

fold; crease; wrinkle

curled-leaf parsley (Petroselinum crispum)

to shrink and contract, forming wrinkles or becoming withered

to draw together into wrinkles or folds, especially of the eyebrows or lips

(bird species of China) wreathed hornbill (Rhyticeros undulatus)

fold mountain system (geology)

fold mountain range (geology)