Search Result for "dumbness": 
Wordnet 3.0

NOUN (1)

1. the quality of being mentally slow and limited;
[syn: denseness, dumbness, slow-wittedness]



The Collaborative International Dictionary of English v.0.48:

Dumbness \Dumb"ness\, n.
   The quality or state of being dumb; muteness; silence;
   inability to speak.
   [1913 Webster]


WordNet (r) 3.0 (2006):

dumbness
    n 1: the quality of being mentally slow and limited [syn:
         denseness, dumbness, slow-wittedness]