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):
aimlessly adv 1: without aim; in an aimless manner; "he wandered around aimlessly"