Definition of Stilted

Babylon English Dictionary
stiff and awkward, labored, forced, artificial
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Stilted Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(imp. & p. p.)
of Stilt
  
(a.)
Elevated as if on stilts; hence, pompous; bombastic; as, a stilted style; stilted declamation.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
WordNet 2.0

Adjective
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"
(synonym) artificial, contrived, hokey
(similar) affected, unnatural