gaiety

noun

1. (dated, uncountable)The state of being happy or merry.

   “There was much gaiety at the ball.”

   “The decorations added greatly to the gaiety of the room.”

   “During the present gayety of the house, however, the poor girl has gone about with a face full of trouble, and to use the housekeeper's words, "has fallen into a sad hystericky way lately."”

   “Now that she had rested and had fed from the luncheon tray Mrs. Broome had just removed, she had reverted to her normal gaiety. She looked cool in a grey tailored cotton dress with a terracotta scarf and shoes and her hair a black silk helmet.”

2. (countable, dated)Merrymaking or festivity.

   “And he would tell her all sorts of wonders, old-world gaieties, long before she was born; and how finely the great Mr. [George Frideric] Handel played upon the harpischord^([sic]) in the Music Hall, and how his talk was in German, Latin, French, English, Italian, and half-a-dozen languages beside, […]”