The Collaborative International Dictionary of English v.0.48:

Incomparable \In*com"pa*ra*ble\, a. [L. incomparabilis: cf. F.
   incomparable. See In- not, and Comparable.]
   Not comparable; admitting of no comparison with others;
   unapproachably eminent; without a peer or equal; matchless;
   peerless; transcendent.
   [1913 Webster]

         A merchant of incomparable wealth.       --Shak.
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         A new hypothesis . . . which hath the incomparable Sir
         Isaac Newton for a patron.               --Bp.
                                                  Warburton.
   -- In*com"pa*ra*ble*ness, n. -- In*com"pa*ra*bly, adv.
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         Delights incomparably all those corporeal things. --Bp.
                                                  Wilkins.
   [1913 Webster]