[1] : The Collaborative International Dictionary of English v.0.48

triumphant \trium"phant\, a. l. triumphans, p. pr. of
   triumphare: cf. f. triomphant. see triumph, v. i.
   1913 webster
   1. rejoicing for victory; triumphing; exultant.
      1913 webster

            successful beyond hope to lead ye forth
            triumphant out of this infernal pit.  --milton.
      1913 webster

   2. celebrating victory; expressive of joy for success; as, a
      triumphant song or ode.
      1913 webster

   3. graced with conquest; victorious.
      1913 webster

            athena, war's triumphant maid.        --pope.
      1913 webster

            so shall it be in the church triumphant. --perkins.
      1913 webster

   4. of or pertaining to triumph; triumphal. obs.
      1913 webster

            captives bound to a triumphant car.   --shak.
      1913 webster

   church triumphant, the church in heaven, enjoying a state
      of triumph, her warfare with evil being over; --
      distinguished from church militant. see under
      militant.
      1913 webster
see also:
triumph church triumphant church militant militant 

[2] : WordNet (r) 2.0

triumphant
     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
     2: experiencing triumph syn: victorious
see also:
exultant exulting jubilant prideful rejoicing triumphal 
victorious 

[3] : Moby Thesaurus II by Grady Ward, 1.0

37 moby thesaurus words for "triumphant":
   ascendant, assured of success, cock-a-hoop, coming, conquering,
   crowing, crowned with success, defeating, dominant, elate, elated,
   exultant, exulting, flushed, flushed with success, fortunate,
   gloating, in ascendancy, in high feather, in the ascendant,
   jubilant, made, on the up-and-up, on top, out in front, overcoming,
   prevailing, prosperous, rejoicing, succeeding, successful,
   surefire, triumphal, undefeated, vanquishing, victorious,
   winning

Triumphant >> T Words
Triumphant, definition of term: Triumphant
triumphant_pag1.html