SINCE 1828

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unfrivolous

adjective un·friv·o·lous \ ˌən-ˈfri-və-ləs \

Definition of unfrivolous

: not frivolous : having real seriousness or importance

an unfrivolous objection

the unfrivolous matter of the national budget

First Known Use of unfrivolous

1840

in the meaning defined above

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