The Collaborative International Dictionary of English v.0.48:
Dirtiness \Dirt"i*ness\, n. The state of being dirty; filthiness; foulness; nastiness; baseness; sordidness. [1913 Webster]WordNet (r) 3.0 (2006):
dirtiness n 1: the state of being unsanitary [syn: dirtiness, uncleanness] [ant: cleanness] 2: the state of containing dirty impurities 3: obscenity in speech or writing [syn: smuttiness, dirtiness]