Definitions
from The American Heritage® Dictionary of the English Language, 4th Edition
 n. A line that deviates from straightness in a smooth, continuous fashion.
 n. A surface that deviates from planarity in a smooth, continuous fashion.
 n. Something characterized by such a line or surface, especially a rounded line or contour of the human body.
 n. A relatively smooth bend in a road or other course.
 n. A line representing data on a graph.
 n. A trend derived from or as if from such a graph: "Once again, the politicians are behind the curve” ( Ted Kennedy).
 n. A graphic representation showing the relative performance of individuals as measured against each other, used especially as a method of grading students in which the assignment of grades is based on predetermined proportions of students.
 n. Mathematics The graph of a function on a coordinate plane.
 n. Mathematics The intersection of two surfaces in three dimensions.
 n. Mathematics The graph of the solutions to any equation of two variables.
 n. Baseball A curve ball.
 n. Slang Something that is unexpected or designed to trick or deceive.
 intransitive v. To move in or take the shape of a curve: The path curves around the lake.
 transitive v. To cause to curve. See Synonyms at bend1.
 transitive v. Baseball To pitch a curve ball to.
 transitive v. To grade (students, for example) on a curve.
from Wiktionary, Creative Commons Attribution/ShareAlike License
 adj. Bent without angles; crooked; curved.
 n. A gentle bend, such as in a road.
 n. A simple figure containing no straight portions and no angles; a curved line.
 n. A grading system based on the scale of performance of a group used to normalize a rightskewed grade distribution (with more lower scores) into a bell curve, so that more can receive higher grades, regardless of their actual knowledge of the subject.
 n. A continuous map from a onedimensional space to a multidimensional space.
 n. A onedimensional figure of nonzero length; the graph of a continuous map from a onedimensional space.
 n. An algebraic curve; a polynomial relation of the planar coordinates.
 n. A onedimensional continuum.
 n. The attractive shape of a woman's body.
 v. To bend; to crook.
 v. To cause to swerve from a straight course.
 v. To bend or turn gradually from a given direction.
 v. To grade on a curve (bell curve of a normal distribution).
from the GNU version of the Collaborative International Dictionary of English
 adj.
 adj. Bent without angles; crooked; curved.
 n. A bending without angles; that which is bent; a flexure.
 n. A line described according to some low, and having no finite portion of it a straight line.
 intransitive v. To bend or turn gradually from a given direction.
 transitive v. To bend; to crook; ; to cause to swerve from a straight course.
from The Century Dictionary and Cyclopedia
 Bending; crooked; curved.
 n. A continuous bending; a flexure without angles; usually, as a concrete noun, a oneway geometrical locus which may be conceived as described by a point moving along a line round which as axis turns a plane, while the line rotates in the plane round the point.
 n. Anything continuously bent.
 n. A draftsman's instrument for forming curved figures.
 n. In baseball, the course of a ball so pitched that it does not pass in a straight line from the pitcher to the catcher, but makes a deflection in the air other than the ordinary one caused by the force of gravity: as, it was difficult to gage the curves of the pitcher.
 To bend; cause to take the shape of a curve; crook; inflect.
 To have or assume a curved or flexed form: as, to curve inward.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
 n. a line on a graph representing data
 v. bend or cause to bend
 v. turn sharply; change direction abruptly
 n. the property possessed by the curving of a line or surface
 n. curved segment (of a road or river or railroad track etc.)
 n. the trace of a point whose direction of motion changes
 v. extend in curves and turns
 v. form an arch or curve
 v. form a curl, curve, or kink
 n. a pitch of a baseball that is thrown with spin so that its path curves as it approaches the batter
Etymologies
Examples

And in the middle of the curve is a nook about fiveandahalf feet tall, a bit more than two feet wide and a foot deep.

If you delay, then the stimulus might not start to work until the curve is already headed back up.

And then for others the curve is anything but bellshaped.

Actually the curve is an exponential so every point over 100 counts more and more.
EXTRALIFE – By Scott Johnson  Great Homer Pentium ad from a few years back.

The continuance of the curve is a narrow, unrailed bridge.

Apply a label curve style to your conduit preferences.

He has urged what he calls curve shifting, an overhaul of human behavior toward healthier living.

The menu is under Format / Style Manager. go into Documentation Objects / Property Set Definitions / Check if you have a type you need otherwise create your own. then attach a label curve to your drawing from the pallette and select the property set you want to attach.

For people having a strong sense of irony, that curve is mirrored …

Are we saying that being on the top of that curve is a … bad thing?
scarequotes commented on the word curve
http://www.today.com/style/forgetplussizemodelshavechosennewworddescribetheirt60441
While these new models are not the standard size 0 or 2 that we often see gracing the catwalk, they are not going to let the size of their clothing define them. Instead, they're trying to change the way the fashion industry (and the rest of the world) sees them, with the term "curve" — which describes the shape of their body, not just their waistline.
The movement recently came into the spotlight after 18yearold model Jordyn Woods, a newcomer to the modeling scene, was featured in an interview on TeenVogue.com in which she referred to herself as a "curve model" rather than the more common industry term, "plussize."
December 9, 2015