Antonym of serious

Antonyms of adj serious

6 senses of serious

Sense 1:

serious (vs. frivolous)

frivolous (vs. serious)
airheaded, dizzy, empty-headed, featherbrained, giddy, light-headed, lightheaded, sillyflighty, flyaway, head-in-the-clouds, scatterbrainedflippant, light-mindedidle, lightlighttrivial

Sense 2:

serious

INDIRECT (VIA important) -> unimportant

Sense 3:

dangerous, grave, grievous, serious, severe, life-threatening

INDIRECT (VIA critical) -> noncritical, noncrucial

Sense 4:

good, serious

INDIRECT (VIA intellectual) -> nonintellectual

Sense 5:

unplayful (vs. playful), serious, sober

Sense 6:

serious

INDIRECT (VIA difficult) -> easy