The Collaborative International Dictionary of English v.0.48:

Peerless \Peer"less\, a.
   Having no peer or equal; matchless; superlative. "Her
   peerless feature." --Shak.
   [1913 Webster]

         Unvailed her peerless light.             --Milton.
   [1913 Webster] --Peer"less*ly, adv. -- Peer"less*ness, n.
   [1913 Webster]