Source : Webster's Revised Unabridged Dictionary (1913)

Purposeless \Pur"pose*less\, a.
   Having no purpose or result; objectless. --Bp. Hall. --
   {Pur"pose*less*ness}, n.

Source : WordNet®

purposeless
     adj 1: not evidencing any purpose of goal [ant: {purposeful}]
     2: lacking import; "a pointless remark"; "a life essentially
        purposeless"; "senseless violence" [syn: {pointless}, {senseless}]