Source : Webster's Revised Unabridged Dictionary (1913)

Aimless \Aim"less\, a.
   Without aim or purpose; as, an aimless life. --
   {Aim"less*ly}, adv. -- {Aim"less*ness}, n.

Source : WordNet®

aimlessly
     adv : in an aimless manner; "he wandered around aimlessly" [syn: {without
           aim}]