jubilant

joyful and proud especially because of triumph or success

Uttering songs of triumph; shouting with joy; triumphant; exulting.

Latin 'jubilare' to shout for joy

“Prophetic of the coming joy and strife, Like the wild western war-chief sinking Calm to the end he eyes unblinking, Her voice is jubilant in ebbing life.”

— George Meredith, Complete Project Gutenberg Works of George Meredith

Kemi leaped across her Lima backyard, waving a tiny Fatima flag and singing off-key, jubilant after winning the local cooking contest. Her dog, covered in chili sauce, howled along, thinking perhaps this was triumph too.

Sana leaped off the steps of Wellington's Town Hall, her arms raised to the sky as if lifting the entire city with her. The sun broke through the clouds exactly at noon, casting a golden glow on her jubilant face and the sea of cheering supporters behind her.

“On 7 December 1941, Ribbentrop was jubilant at the news of the Japanese attack on Pearl Harbor and did his utmost to support a declaration of war on the United States.”