nonserious
ADJECTIVE
frivolous
Synonyms
STRONGEST
WEAK
barmy
childish
dizzy
empty-headed
facetious
featherbrained
flighty
flip
flippant
gay
giddy
harebrained
idle
ill-considered
juvenile
light
light-minded
minor
niggling
not serious
paltry
peripheral
playful
puerile
scatterbrained
shallow
sportive
superficial
tongue-in-cheek
unimportant
unprofound
volatile
whimsical
Antonyms
From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.