The meaning of the word 'Levity' is -

• Levity (noun) [uncountable noun]

English Meaning: Amusement or lack of seriousness.
Bangla Meaning: (আনুষ্ঠানিলঘুতা; চপলতা; চাপল্য; চিন্তাহীনতা।

Synonyms: Hilarity (আনন্দোচ্ছ্বাস; আনন্দহিল্লোল), Triviality (অকিঞ্চিৎকরত্ব;
তুচ্ছতা), Silliness (বোকামি), Mirth (আনন্দোচ্ছলতা), Frivolity (ছেবলামি)।
Antonyms: Seriousness (গুরুতর অবস্থা), Gravity (গম্ভীর ভাব), Constancy (স্থিরতা;
দৃঢ়চিত্ততা), Stability (স্থিরতা), Sobriety (আত্মনিয়ন্ত্রণ)।

Other Forms:
Example Sentence: 
1. Despite the undercurrent of levity, the activists were quite serious in their intent.
2. The environment of the meeting was changed due to the Levity of the members.

Source: Lecture.