The Collaborative International Dictionary of English v.0.48:
Indefiniteness \In*def"i*nite*ness\, n. The quality of being indefinite. [1913 Webster]WordNet (r) 3.0 (2006):
indefiniteness n 1: the quality of being vague and poorly defined [syn: indefiniteness, indeterminateness, indefinity, indetermination, indeterminacy]