Source : Webster's Revised Unabridged Dictionary (1913)

Gratulatory \Grat"u*la*to*ry\, a. [L. gratulatorius.]
   Expressing gratulation or joy; congratulatory.

         The usual groundwork of such gratulatory odes. --Bp.
                                                  Horsley.

Source : WordNet®

gratulatory
     adj : expressive of sympathetic pleasure or joy on account of
           someone's success or good fortune; "a congratulatory
           telegram"; "the usual congratulatory crowd was
           conspicuously absent"; "a gratulatory address" [syn: {congratulatory}]