The Collaborative International Dictionary of English v.0.48:

Omnipotent \Om*nip"o*tent\, a. [F., fr.L. omnipotens, -entis;
   omnis all + potens powerful, potent. See Potent.]
   1. Able in every respect and for every work; unlimited in
      ability; all-powerful; almighty; as, the Being that can
      create worlds must be omnipotent.
      [1913 Webster]

            God's will and pleasure and his omnipotent power.
                                                  --Sir T. More.
      [1913 Webster]

   2. Having unlimited power of a particular kind; as,
      omnipotent love. --Shak.
      [1913 Webster]

   The Omnipotent, The Almighty; God. --Milton.
      [1913 Webster]

WordNet (r) 3.0 (2006):

omnipotent
    adj 1: having unlimited power [syn: almighty, all-powerful,
           omnipotent]