/ traɪˈʌmfənt; NAmE / adjective
1.
very successful in a way that causes great satisfaction :
They emerged triumphant in the September election.
2.
showing great satisfaction or joy about a victory or success :
a triumphant smile
► tri·umph·ant·ly adverb
••
WORD ORIGIN
late Middle English (in the sense victorious ): from Old French , or from Latin triumphant- celebrating a triumph, from the verb triumphare , probably from Greek thriambos hymn to Bacchus (the Greek god).