Celebrating victory; expressive of joy for success; as, a triumphant song or ode
joyful and proud especially because of triumph or success; "rejoicing crowds filled the streets on VJ Day"; "a triumphal success"; "a triumphant shout"
Someone who is triumphant has gained a victory or succeeded in something and feels very happy about it. The captain's voice was triumphant This trip was not like his first triumphant return home in 1990. + triumphantly tri·um·phant·ly They marched triumphantly into the capital