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]

Moby Thesaurus II by Grady Ward, 1.0:

115 Moby Thesaurus words for "stilted":
   Gongoresque, Johnsonian, Latinate, affected, artificial, aureate,
   awkward, bedizened, big-sounding, bloated, bombastic, buckram,
   cardboard, clumsy, conventional, convoluted, cramped, cumbrous,
   declamatory, decorous, elephantine, elevated, erect, euphuistic,
   exalted, flamboyant, flaming, flashy, flatulent, flaunting,
   flowery, forced, formal, fulsome, garish, gassy, gaudy, graceless,
   grandiloquent, grandiose, grandisonant, guinde, halting, heavy,
   high, high-flowing, high-flown, high-flying, high-sounding,
   highfalutin, in buckram, inflated, inkhorn, la-di-da, labored,
   labyrinthine, leaden, lexiphanic, lifted, lofty, lumbering, lurid,
   magniloquent, mannered, meretricious, mincing, muscle-bound,
   on stilts, orotund, ostentatious, overblown, overdone,
   overelaborate, overinvolved, overwrought, pedantic, pompous,
   ponderous, pontifical, pretentious, prim, raised, rampant,
   rhetorical, rigid, self-important, sensational, sensationalistic,
   sententious, sesquipedalian, showy, solemn, sonorous, starch,
   starched, stiff, stuffy, sublime, swollen, tall, too-too, tortuous,
   tumid, turgid, ungraceful, unnatural, unwieldy, upcast, upflung,
   uplifted, upraised, upreared, upright, upthrown, wooden