Source : Webster's Revised Unabridged Dictionary (1913)

Broadness \Broad"ness\, n. [AS. br[=a]dnes.]
   The condition or quality of being broad; breadth; coarseness;
   grossness.

Source : WordNet®

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