verb (used with object)
to form into coils or ringlets, as the hair.
to form into a spiral or curved shape; coil.
to adorn with, or as with, curls or ringlets.
verb (used without object)
to grow in or form curls or ringlets, as the hair.
to become curved or undulated.
to coil.
to play at the game of curling.
to progress in a curving direction or path; move in a curving or spiraling way: The ball curled toward the plate.
a coil or ringlet of hair.
anything of a spiral or curved shape, as a lettuce leaf, wood shaving, etc.
a coil.
the act of curling or state of being curled.
Plant Pathology.
the distortion, fluting, or puffing of a leaf, resulting from the unequal development of its two sides.
a disease so characterized.
Also called rotation. Mathematics.
a vector obtained from a given vector by taking its cross product with the vector whose coordinates are the partial derivative operators with respect to each coordinate.
the operation that produces this vector.
an underhand forearm lift in which the barbell, held against the thighs, is raised to the chest and then lowered while keeping the legs, upper arms, and shoulders taut.
a similar forearm lift using a dumbbell or dumbbells, usually from the side of the body to the shoulders.
Verb phrases
curl up, to sit or lie down cozily: to curl up with a good book.
curl one's lip, to assume or display an expression of contempt: He curled his lip in disdain.
curl one's/the hair, to fill with horror or fright; shock: Some of his stories about sailing across the Atlantic are enough to curl one's hair.

1400–50; late Middle English, apparently back formation from curled, metathetic variant of Middle English crulled (past participle) crul (adj.); compare Middle Dutch crullen to curl, cruller

curledly [kur-lid-lee, kurld-] , adverb
curledness, noun
intercurl, verb
undercurl, noun
undercurl, verb
well-curled, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To curl
World English Dictionary
curl (kɜːl)
vb (sometimes foll by up)
1.  (intr) (esp of hair) to grow into curves or ringlets
2.  to twist or roll (something, esp hair) into coils or ringlets
3.  (often foll by up) to become or cause to become spiral-shaped or curved; coil: the heat made the leaves curl up
4.  (intr) to move in a curving or twisting manner
5.  (intr) to play the game of curling
6.  curl one's lip to show contempt, as by raising a corner of the lip
7.  a curve or coil of hair
8.  a curved or spiral shape or mark, as in wood
9.  the act of curling or state of being curled
10.  any of various plant diseases characterized by curling of the leaves
11.  maths divergence Compare gradient rot, Also called: rotation a vector quantity associated with a vector field that is the vector product of the operator ∇ and a vector function A, where ∇ = i∂/∂x + j∂/∂by + k∂/∂z,i, j, and k being unit vectors. Usually written curl A, rot A
[C14: probably from Middle Dutch crullen to curl; related to Middle High German krol curly, Middle Low German krūs curly]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

mid-15c., metathesis of crulle (c.1300), probably from O.E. or from M.Du. krul "curly," from P.Gmc. *krusl-. The game of curling is so called from c.1620.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Mixed with chemicals, biocatalysts tend to curl up and die.
Stony ridges rise up from ravines, dry riverbeds and hardly vegetated plains,
  and curl around each other.
Yes, the mentions of rats make me want to curl up in full fetal too.
Put in a stewpan and cook until oysters are plump and edges begin to curl.
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