(intransitive) to adopt a reclining position with the legs close to the body and the back rounded
to become or cause to become spiral-shaped or curved
(intransitive) to retire to a quiet cosy setting to curl up with a good novel
(Brit, informal) to be or cause to be embarrassed or disgusted (esp in the phrase curl up and die)
(intransitive) (esp of hair) to grow into curves or ringlets
(transitive) sometimes foll by up. to twist or roll (something, esp hair) into coils or ringlets
(often foll by up) to become or cause to become spiral-shaped or curved; coil the heat made the leaves curl up
(intransitive) to move in a curving or twisting manner
(intransitive) to play the game of curling
curl one's lip, to show contempt, as by raising a corner of the lip
a curve or coil of hair
a curved or spiral shape or mark, as in wood
the act of curling or state of being curled
any of various plant diseases characterized by curling of the leaves
(maths) Also called rot, 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 ACompare divergence (sense 4), gradient (sense 4)
Assume a position with the legs drawn up; settle down for sleep in this posture. For example, I love to curl up with a good book.
[ c. 1900
curl up and die. Retreat, collapse, die, as in At first the horse was ahead but in the home stretch she curled up and died, or I'll just curl up and die if he shows up. This colorful expression for collapsing or dying is often used hyperbolically (second example).
[ Early 1900s
curl someone up. Kill someone, as in The sheriff said he'd curl up that outlaw. This usage originated as cowboy slang in the second half of the 1800s.