Source : Webster's Revised Unabridged Dictionary (1913)

Felicitation \Fe*lic`i*ta"tion\, n. [Cf. F. f['e]licitation.]
   The act of felicitating; a wishing of joy or happiness;
   congratulation.

Source : WordNet®

felicitation
     n 1: (usually plural) an expression of pleasure at the success or
          good fortune of another; "I sent them my sincere
          congratulations on their marriage" [syn: {congratulation}]
     2: the act of acknowledging that someone has an occasion for
        celebration [syn: {congratulation}]