: unduly or excessively serious
an overserious person
had an overserious expression on her face
The story sometimes edges toward soapy melodrama but saves itself from becoming overserious with cheeky humor …PublishersWeekly.com
overseriously adverb
took everything overseriously

Word History

First Known Use

1622, in the meaning defined above

Time Traveler
The first known use of overserious was in 1622

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Cite this Entry

“Overserious.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/overserious. Accessed 2 Aug. 2026.

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