lightness of manner or speech, especially when inappropriate

an instance of being frivolous or lacking due seriousness

गंभीरता का अभाव

English Usage: The levity of the children was contagious, making everyone laugh.

Hindi Usage: बच्चों के अवसाद में हल्कापन संक्रामक था, जिससे सबको हंसी आ गई।