Cone Definition

coned, cones, coning
A flat-based, single-pointed solid formed by a rotating straight line that traces out a closed-curved base from a fixed vertex point that is not in the same plane as the base; esp., one (right circular cone) formed by tracing a circle from a vertex perpendicular to the center of the base (also formed by rotating a right triangle 360° with either leg as the axis, or by rotating an isosceles triangle 360° with the altitude as the axis)
Webster's New World
The surface of such a solid.
Webster's New World
The figure formed by a cone, bound or regarded as bound by its vertex and a plane section taken anywhere above or below the vertex.
American Heritage
A similar unbounded surface extending outward in both directions from a point: it is formed by rotating in an elliptical or circular pattern a straight line that always passes through this point.
Webster's New World
Any object or mass shaped like a cone.
Webster's New World
coned, cones, coning
To shape like a cone or a conical segment.
Webster's New World

Other Word Forms of Cone



Origin of Cone

  • French cône Middle English cone angle of a quadrant both from Latin cōnus from Greek kōnos kō- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle French cone, from Latin conus (“cone, wedge, peak”), from Ancient Greek κώνος (konos, “cone, spinning top, pine cone”)

    From Wiktionary

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