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Synonyms
birdbrained, ditzy (or ditsy), dizzy, featherbrained, flighty, frivolous, frothy, futile, giddy, goofy, harebrained, light-headed, puerile, scatterbrained, silly, yeasty
Antonyms
earnest, serious, serious-minded, sober, unfrivolous
1575, in the meaning defined above
More from Merriam-Webster on light-minded
Thesaurus: All synonyms and antonyms for light-minded
See Definitions and Examples
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