/jooh'beuh lay"sheuhn/ , n.
1. a feeling of or the expression of joy or exultation: Their jubilation subsided when they lost the second game.
2. a joyful or festive celebration.
[ 1350-1400; ME jubilacioun ( jubilation- (s. of jubilatio ) a shouting for joy, equiv. to jubilat- (see JUBILATE) + -ion- -ION ]