Synonyms of frivolous in English:

frivolous


See US English definition of frivolous

See UK English definition of frivolous

See Spanish definition of frívolo

adjective

1‘I worried constantly about whether they thought I was frivolous or silly’

SYNONYMS
giddy, silly, foolish, facetious, zany, light-hearted, merry, superficial, shallow, lacking seriousness, non-serious, light-minded, whimsical, skittish, flighty, irresponsible, thoughtless, lacking in sense, feather-brained, empty-headed, pea-brained, birdbrained, vacuous, vapid
informal dizzy, dippy, dopey, nutty
British informal batty, dotty
North American informal ditzy
ANTONYMS

sensible, serious

2‘they never indulged in frivolous remarks’

SYNONYMS
flippant, glib, waggish, joking, jokey, light-hearted, facetious, fatuous, inane, shallow, superficial, senseless, thoughtless, ill-considered, non-serious
informal flip
British informal daft
archaic frolicsome, sportive, jocose
ANTONYMS

serious

3‘her face was thickly painted and her clothes were frivolous’

SYNONYMS
impractical, frothy, flimsy, insubstantial
ANTONYMS

practical

4‘new rules to stop frivolous lawsuits’

SYNONYMS
time-wasting, trivial, trifling, minor, petty, lightweight, insignificant, unimportant, worthless, valueless, pointless, paltry, niggling, peripheral
ANTONYMS

important