The Collaborative International Dictionary of English v.0.48:

Stilted \Stilt"ed\, a.
   Elevated as if on stilts; hence, pompous; bombastic; as, a
   stilted style; stilted declamation.
   [1913 Webster]

   Stilted arch (Arch.), an arch in which the springing line
      is some distance above the impost, the space between being
      occupied by a vertical member, molded or ornamented, as a
      continuation of the archivolt, intrados, etc.
      [1913 Webster]