The Collaborative International Dictionary of English v.0.48:

Stilt \Stilt\, v. t. [imp. & p. p. Stilted; p. pr. & vb. n.
   Stilting.]
   To raise on stilts, or as if on stilts.
   [1913 Webster]

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]

WordNet (r) 3.0 (2006):

stilted
    adj 1: artificially formal; "that artificial humility that her
           husband hated"; "contrived coyness"; "a stilted letter of
           acknowledgment"; "when people try to correct their speech
           they develop a stilted pronunciation" [syn: artificial,
           contrived, hokey, stilted]