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English definition of “frivolous”

frivolous

adjective    /ˈfrɪv·ə·ləs/
(of people ) behaving in a silly and foolish way, or (of activities or objects ) silly or unimportant : I’m very frivolous – I just like to have fun . With our justice system there are a lot of frivolous cases that go to court . frivolously    /ˈfrɪv·ə·lə·sli/ adverb We don’t have a monthly budget , but we don’t spend frivolously either.
(Definition of frivolous adjective from the Cambridge Academic Content Dictionary © Cambridge University Press)
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