Definition of levity:
a manner lacking seriousness
Synonyms of levity:
frivolity, flippancy, lightness, flightiness, giddiness, buoyancy, facetiousness, mirth, amusement, jocularity, humor
Opposite/Antonyms of levity:
permanence, seriousness, gravity, earnestness, solemnity, soberness, depression, heaviness, gloominess
Sentence/Example of levity:
The company encourages a little levity to make crammed flights slightly more tolerable.