1. To represent in words.
    The feeling is difficult to describe, but not unpleasant.
    The geographer describes countries and cities.
  2. To represent by drawing; to draw a plan of; to delineate; to trace or mark out.
    to describe a circle by the compasses
    a torch waved about the head in such a way as to describe a circle
    Uncas described an arc in the water with his own blade, and as the canoe passed swiftly on, Chingachgook recovered his paddle, and flourishing it on high, he gave the war-whoop of the Mohicans. (James Fenimore Cooper, The Last of the Mohicans)
  3. To give rise to a geometrical structure.
    The function describes a very complex surface.
  4. To reveal a new species by scientifically explaining its characteristics and particularly how it differs from other species.
    The fungus was first described by a botanist.
  5. To distribute into parts, groups, or classes; to mark off; to class.

The above text is a snippet from Wiktionary: describe
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