Source : Webster's Revised Unabridged Dictionary (1913)

Cirque \Cirque\, n. [F., fr. L. circus.]
   1. A circle; a circus; a circular erection or arrangement of
      objects.

            A dismal cirque Of Druid stones upon a forlorn moor.
                                                  --Keats.

   2. A kind of circular valley in the side of a mountain,
      walled around by precipices of great height.

Source : WordNet®

cirque
     n : a steep-walled semicircular basin in a mountain; may contain
         a lake [syn: {corrie}, {cwm}]