Source : Webster's Revised Unabridged Dictionary (1913)

Wideness \Wide"ness\, n.
   1. The quality or state of being wide; breadth; width; great
      extent from side to side; as, the wideness of a room. ``I
      landed in a small creek about the wideness of my canoe.''
      --Swift.

   2. Large extent in all directions; broadness; greatness; as,
      the wideness of the sea or ocean.

Source : WordNet®

wideness
     n : the property of being wide; having great width [syn: {broadness}]
         [ant: {narrowness}]