The Collaborative International Dictionary of English v.0.48:
Aimless \Aim"less\, a. Without aim or purpose; as, an aimless life. -- Aim"less*ly, adv. -- Aim"less*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
aimlessness n 1: the quality of lacking any definite purpose [syn: purposelessness, aimlessness] [ant: purposefulness, sense of purpose]