[syn: tranquillity, tranquility, quietness, quietude]
The Collaborative International Dictionary of English v.0.48:
Quietness \Qui"et*ness\, n.
   The quality or state of being quiet; freedom from noise,
   agitation, disturbance, or excitement; stillness;
   tranquillity; calmness.
   [1913 Webster]
         I would have peace and quietness.        --Shak.
   [1913 Webster]
WordNet (r) 3.0 (2006):
quietness
    n 1: the property of making no sound [syn: quietness,
         soundlessness]
    2: a state of peace and quiet [syn: tranquillity,
       tranquility, quietness, quietude]