The Collaborative International Dictionary of English v.0.48:
Newness \New"ness\, n. The quality or state of being new; as, the newness of a system; the newness of a scene; newness of life. [1913 Webster]WordNet (r) 3.0 (2006):
newness n 1: the quality of being new; the opposite of oldness [ant: oldness]