- The definition of serious is showing deep thought, not joking, or a situation that requires careful thought.
- An example of serious is wearing a full suit to a casual dinner; serious attire.
- An example of serious is a person who doesn't smile or laugh easily; serious person.
- An example of serious is sky diving; serious sport.
A man with a serious expression.
- of, showing, having, or caused by earnestness or deep thought; earnest, grave, sober, or solemn: a serious person
- meaning what one says or does; not joking or trifling; sincere
- meant in earnestness; not said or done in play
- concerned with grave, important, or complex matters, problems, etc.; weighty: a serious novel
- requiring careful consideration or thought; involving difficulty, effort, or considered action: a serious problem
- giving cause for concern; dangerous: a serious wound
Origin of seriousMiddle English seryows ; from Medieval Latin seriosus ; from Classical Latin serius, grave, origin, originally , probably weighty, heavy ; from uncertain or unknown; perhaps Indo-European base an unverified form swer- from source Old English swær, heavy, sad, Gothic swers, important, origin, originally , heavy
- Careful in thought, full of concern, or restrained and dignified in manner; somber or grave: He became serious when he was asked about the economy.
- a. Requiring or carried out with careful thought or concern: a serious effort to reform tax policy.b. Intended for sophisticated people. serious music.
- Deeply interested or involved: a serious golfer.
- a. Concerned with important rather than trivial matters: a serious discussion.b. Not joking or trifling: He is not kidding. He is serious.
- Informal Of considerable size or scope; substantial: a serious amount of money.
- a. Being of such import as to cause anxiety: serious injuries.b. Not easily answered or solved: a serious problem.
Origin of seriousMiddle English, from Old French serieux, from Late Latin sēriōsus, from Latin sērius.
(comparative seriouser or more serious, superlative seriousest or most serious)
- Without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn.
- It was a surprise to see the captain, who had always seemed so serious, laugh so heartily.
- Important; weighty; not trifling; leaving no room for play; needing great attention; critical.
- This is a serious problem. We'll need our best experts.
- Really intending what is said; being in earnest; not jesting or deceiving; meaningful.
- After all these years, we're finally getting serious attention.
From Middle English seryows, from Old French serieux, from Medieval Latin sēriōsus, an extension of Latin sērius (“grave, earnest, serious”), from Proto-Indo-European *swēr- (“heavy”). Cognate with German schwer (“heavy, difficult, severe”), Old English swǣr (“heavy, grave, grievous”). More at swear, sweer.