Definitions:

1. Describes a situation or atmosphere filled with laughter and enjoyment. NOUN
   • Despite the stressful situation, they found hilarity in the absurdity of their predicament.
2. Refers to a state or quality of being extremely amusing, characterized by laughter, merriment, and a sense of joyous amusement. NOUN
   • The children's party was filled with games, music, and hilarity as they celebrated together.

Synonyms:

• cheer
• cheerfulness
• festivity
• glee
• gleefulness
• merriness
• mirth
• mirthfulness