Shaped like a cone; having come to a point at the end, or having been restricted with traffic cones.
Past participle of the verb 'cone,' derived from the noun 'cone' (from Latin 'conus'), meaning either to shape into a conical form or to block off with cone-shaped barriers.
When construction workers set out traffic cones, they're literally 'coning' an area—the word jumped from geometry into street language because the shape was so recognizable and useful.
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