1. Relating to or celebrating a triumph
   "a triumphal procession"; "a triumphal arch" 
2. Joyful and proud especially because of triumph or success
   "a triumphal success"
   - exultant, exulting, jubilant, prideful, rejoicing, triumphant

See also: elated, triumph

• Dieffenbachia
• Dieffenbachia sequine
• diegesis
• Diego Rivera
• Diego Rodriguez de Silva y Velazquez
• Diegueno
• diehard
• dielectric
• dielectric heating
• dielectrolysis
• diemaker
• Dien Bien Phu
• diencephalon
• diene
• dieresis
• Diervilla
• Diervilla lonicera
• Diervilla sessilifolia
• Dies Irae
• diesel
• diesel engine
• diesel fuel
• diesel locomotive
• diesel motor
• diesel oil