The Collaborative International Dictionary of English v.0.48:
Godless \God"less\, a. Having, or acknowledging, no God; without reverence for God; impious; wicked. -- God"less*ly, adv. -- God"less*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
godlessness n 1: the doctrine or belief that there is no God [syn: atheism, godlessness] [ant: theism] 2: impiety by virtue of not being a godly person [syn: ungodliness, godlessness] [ant: godliness]