The Collaborative International Dictionary of English v.0.48:

Exultant \Ex*ult"ant\, a. [L. exsultans, exsultantis, p. pr. of
   exsultare. See Exult.]
   Inclined to exult; characterized by, or expressing,
   exultation; rejoicing triumphantly.
   [1913 Webster]

         Break away, exultant, from every defilement. --I.
                                                  Tay;or.
   [1913 Webster]

WordNet (r) 3.0 (2006):

exultant
    adj 1: joyful and proud especially because of triumph or
           success; "rejoicing crowds filled the streets on VJ Day";
           "a triumphal success"; "a triumphant shout" [syn:
           exultant, exulting, jubilant, prideful,
           rejoicing, triumphal, triumphant]

Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "exultant":
   bursting with happiness, carried away, cock-a-hoop, crowing,
   delighted, delighting, ecstatic, elate, elated, enchanted,
   enraptured, enravished, entranced, exalted, exuberant, exulting,
   flushed, freaked out, glad, gleeful, gloating, happy, high,
   imparadised, in ecstasies, in heaven, in high feather, in paradise,
   in raptures, in seventh heaven, joyful, joyous, jubilant,
   on cloud nine, overjoyed, overjoyful, possessed, rapt, raptured,
   rapturous, ravished, rejoicing, rhapsodic, sent, transported,
   triumphal, triumphant