- of, showing, or characterized by deep thought.
- of grave or somber disposition, character, or manner: a serious occasion; a serious man.
- being in earnest; sincere; not trifling: His interest was serious.
- requiring thought, concentration, or application: serious reading; a serious task.
- weighty or important: a serious book; Marriage is a serious matter.
- giving cause for apprehension; critical: The plan has one serious flaw.
- Medicine/Medical. (of a patient's condition) having unstable or otherwise abnormal vital signs and other unfavorable indicators, as loss of appetite and poor mobility: patient is acutely ill.
- that which is of importance, grave, critical, or somber: You have to learn to separate the serious from the frivolous.
Origin of serious
Synonyms for seriousSee more synonyms for on Thesaurus.com
Antonyms for serious
Related Words for seriousgenuine, deliberate, sincere, thoughtful, honest, severe, major, grievous, dangerous, deep, far-reaching, urgent, important, significant, tough, meaningful, difficult, sober, austere, bound
Examples from the Web for serious
Contemporary Examples of serious
The pulps brought new readers to serious fiction, making it less intimidating with alluring art and low prices.How Pulp Fiction Saved Literature
January 8, 2015
I like the idea of Jon Hamm… There have been discussions—though I'm not sure how serious they've been.‘Archer’ Creator Adam Reed Spills Season 6 Secrets, From Surreal Plotlines to Life Post-ISIS
January 8, 2015
The “nature of the crime” was too serious to release him, they said.His First Day Out Of Jail After 40 Years: Adjusting To Life Outside
January 3, 2015
Launched just 13 years ago, it quickly became a serious rival to MAS and a rising juggernaut in Asia.The Presumed Crash of AirAsia Flight QZ8501 Is Nothing Like MH370
December 29, 2014
But today, these artists are as serious about making dope songs as they are about their faith.Down With the King: Christianity Isn’t Hiding in Rap’s Closet
December 28, 2014
Historical Examples of serious
The other idea was absurd—too wild for serious consideration.The Spenders
Harry Leon Wilson
Moreover, little Helen got in the first remark in the way of serious conversation.Malbone
Thomas Wentworth Higginson
The minister had a serious countenance, and was very placid.
While a Treasury surplus is not the greatest evil, it is a serious evil.
Obviously there had been no serious quarrel between the brothers.Viviette
William J. Locke
- grave in nature or disposition; thoughtfula serious person
- marked by deep feeling; in earnest; sincereis he serious or joking?
- concerned with important mattersa serious conversation
- requiring effort or concentrationa serious book
- giving rise to fear or anxiety; criticala serious illness
- informal worthy of regard because of substantial quantity or qualityserious money; serious wine
- informal extreme or remarkablea serious haircut
Word Origin for serious
mid-15c., "expressing earnest purpose or thought" (of persons), from Middle French sérieux "grave, earnest" (14c.), from Late Latin seriosus, from Latin serius "weighty, important, grave," probably from a PIE root *swer- (4) "heavy" (cf. Lithuanian sveriu "to weigh, lift," svarus "heavy;" Old English swære "heavy," German schwer "heavy," Gothic swers "honored, esteemed," literally "weighty"). As opposite of jesting, from 1712; as opposite of light (of music, theater, etc.), from 1762. Meaning "attended with danger" is from 1800.
- Being of such import as to cause anxiety, as of a physical condition.