From Longman Dictionary of Contemporary Englishjubilantjub‧i‧lant /ˈdʒuːbələnt/ adjective HAPPYSUCCESSFULextremely happy and pleased because of a success Radicals were jubilant at getting rid of him. The fans were in jubilant mood as they left the stadium. —jubilantly adverb
Examples from the Corpus
jubilant• The jubilant fans lifted the players up on their shoulders.• a jubilant smileOrigin jubilant (1600-1700) Latin present participle of jubilare “to call out, shout because you are happy” 