• Cone

    Pronunciation

    • Rhymes: -əʊn

    Origin

    From Middle French cone, from Latin conus ("cone, wedge, peak"), from Ancient Greek κῶνος ("cone, spinning top, pine cone")

    Full definition of cone

    Noun

    cone

    (plural cones)
    1. (geometry) A surface of revolution formed by rotating a segment of a line around another line that intersects the first line.
    2. (geometry) A solid of revolution formed by rotating a triangle around one of its altitudes.
    3. (topology) A space formed by taking the direct product of a given space with a closed interval and identifying all of one end to a point.
    4. Anything shaped like a cone.The Illustrated Oxford Dictionary, Oxford University Press, 1998
    5. The fruit of a conifer.
    6. An ice cream cone.
    7. A traffic cone
    8. A unit of volume, applied solely to marijuana and only while it is in a smokable state; roughly 1.5 cubic centimetres, depending on use.
    9. Any of the small cone-shaped structures in the retina.
    10. (slang) The bowl piece on a bong.
    11. (slang) The process of smoking cannabis in a bong.
    12. (slang) A cone-shaped cannabis joint.
    13. (slang) A passenger on a cruise ship (so-called by employees after traffic cones, from the need to navigate around them)
    14. (category theory) An object V together with an arrow going from V to each object of a diagram such that for any arrow A in the diagram, the pair of arrows from V which subtend A also commute with it. (Then V can be said to be the cone’s vertex and the diagram which the cone subtends can be said to be its base.)
    15. A shell of the genus Conus, having a conical form.
    16. A set of formal languages with certain desirable closure properties, in particular those of the regular languages, the context-free languages and the recursively enumerable languages.

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    Verb

    1. (pottery) To fashion into the shape of a cone.
    2. (frequently followed by "off") To segregate or delineate an area using traffic cones
      • 2006, Great Britain: Department for Transport, Traffic Signs Manual, Part 1 Chapter D5 Single Carriageway Roads, The area occupied by the works should be coned off and the usual advance warning signs should be provided on all approaches

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