Source : Webster's Revised Unabridged Dictionary (1913)

Boundless \Bound"less\, a.
   Without bounds or confines; illimitable; vast; unlimited.
   ``The boundless sky.'' --Bryant. ``The boundless ocean.''
   --Dryden. ``Boundless rapacity.'' ``Boundless prospect of
   gain.'' --Macaulay.

   Syn: Unlimited; unconfined; immeasurable; illimitable;
        infinite. -- {Bound"less*ly}, adv. -- {Bound"less*ness},
        n.

Source : WordNet®

boundlessness
     n : the quality of being infinite; without bound or limit [syn:
         {infiniteness}, {infinitude}, {unboundedness}, {limitlessness}]
         [ant: {finiteness}]