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English definition of “serious”

serious

adjective (EXTREME)    /ˈsɪə.ri.əs/ US  /ˈsɪr.i-/
informal extreme in degree or amount: We did some fairly serious walking over the weekend. I mean we're talking serious (= a large amount of) money, right?Very and extremeComplete and wholeIntensifying expressions informal very good of its type: This is a serious wine, Belle, you've just got to try some.Informal words for goodGood, better and bestQuite good, or not very good
(Definition of serious adjective (EXTREME) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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