- 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 sÄ“riÅsus, an extension of Latin sÄ“rius (â€œgrave, earnest, seriousâ€), from Proto-Indo-European *swÄ“r- (â€œheavyâ€). Cognate with German schwer (â€œheavy, difficult, severeâ€), Old English swÇ£r (â€œheavy, grave, grievousâ€). More at swear, sweer.