Antonyms of noun frivolity

1 of 3 senses of frivolity

Sense 1
frivolity, frivolousness -- (the trait of being frivolous; not serious or sensible)
       Antonym of seriousness (Sense 3)
      => seriousness, earnestness, serious-mindedness, sincerity -- (the trait of being serious; "a lack of solemnity is not necessarily a lack of seriousness"- Robert Rice)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun frivolity

3 senses of frivolity

Sense 1
frivolity, frivolousness -- (the trait of being frivolous; not serious or sensible)
       => trait -- (a distinguishing feature of your personal nature)

Sense 2
bagatelle, fluff, frippery, frivolity -- (something of little value or significance)
       => triviality, trivia, trifle, small beer -- (something of small importance)

Sense 3
buffoonery, clowning, japery, frivolity, harlequinade, prank -- (acting like a clown or buffoon)
       => folly, foolery, tomfoolery, craziness, lunacy, indulgence -- (foolish or senseless behavior)