Merriment (noun)

1. Great joy and enjoyment; festive and light-hearted happiness.
2. The state or quality of being merry; cheerfulness and gaiety.

Origin:

From middle english "meriment" from old french "meriment" which comes from "mer" meaning "joyful" and "ment" meaning "state".

Examples:

1. The party was filled with merriment and laughter.
2. The holiday season is a time of merriment and celebration.
3. The children's faces were alight with merriment as they played in the snow.
4. The concert was filled with music and merriment.
5. The merriment of the crowd was infectious and soon everyone was dancing.