Serious definition

sîrē-əs
Giving cause for concern; dangerous.

A serious wound.

adjective
7
1
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.

adjective
9
6
Meaning what one says or does; not joking or trifling; sincere.
adjective
3
1
Deeply interested or involved.

A serious golfer.

adjective
6
6
Intended for sophisticated people.

Serious music.

adjective
1
2
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Requiring or carried out with careful thought or concern.

A serious effort to reform tax policy.

adjective
0
1
Concerned with important rather than trivial matters.

A serious discussion.

adjective
0
1
Meant in earnestness; not said or done in play.
adjective
0
1
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.

adjective
0
1
Important; weighty; not trifling; leaving no room for play; needing great attention; critical.

This is a serious problem. We'll need our best experts.

adjective
0
1
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Really intending what is said; being in earnest; not jesting or deceiving; meaningful.

After all these years, we're finally getting serious attention.

adjective
0
1
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.

adjective
0
2
(informal) Of considerable size or scope; substantial.

A serious amount of money.

adjective
0
2
Not joking or trifling.

He is not kidding. He is serious.

adjective
0
2
Being of such import as to cause anxiety.

Serious injuries.

adjective
0
2
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Not easily answered or solved.

A serious problem.

adjective
0
2
Of, showing, having, or caused by earnestness or deep thought; earnest, grave, sober, or solemn.

A serious person.

adjective
0
3
Concerned with grave, important, or complex matters, problems, etc.; weighty.

A serious novel.

adjective
0
3
Requiring careful consideration or thought; involving difficulty, effort, or considered action.

A serious problem.

adjective
0
3

Other Word Forms

Adjective

Base Form:
serious
Comparative:
seriouser
Superlative:
seriousest

Origin of serious

  • Middle English from Old French serieux from Late Latin sēriōsus from Latin sērius

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle English seryows, from Old French serieux, from Medieval Latin sÄ“riōsus, an extension of Latin sÄ“rius (“grave, earnest, serious"), from Proto-Indo-European *swÄ“r- (“heavy"). Cognate with German schwer (“heavy, difficult, severe"), Old English swÇ£r (“heavy, grave, grievous"). More at swear, sweer.

    From Wiktionary