grave or thoughtful in appearance or manner; sober
sincere and in earnest; not joking or pretending
Is she serious about giving up her job?
deeply interested or committed
No serious fisherman would use a rod like that
having or possibly leading to important or dangerous consequences; severe
a serious injury
informal substantial in size or quantity
earning serious money
involving or requiring careful attention and concentration
serious study
relating to a weighty or important matter
a serious play
seriousness noun
[Middle English seryows via French from late Latin seriosus, alteration of Latin serius earnest, serious]