Synonyms for serious
ˈsɪər i əsse·ri·ous

WiktionaryRate these synonyms:4.0 / 1 vote

1. seriousadjective

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

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

   Antonyms:
   jesting

2. seriousadjective

   Antonyms:
   trifling, unimportant

Complete Dictionary of Synonyms and AntonymsRate these synonyms:0.0 / 0 votes

1. serious

   Synonyms:
   grave, thoughtful, careful, earnest, solemn, important, weighty

   Antonyms:
   volatile, gay, thoughtless, careless, joking, jocose, insignificant, unimportant, trifling, trivial, light

Princeton's WordNetRate these synonyms:5.0 / 1 vote

1. seriousadjective

   concerned with work or important matters rather than play or trivialities

   "a serious student of history"; "a serious attempt to learn to ski"; "gave me a serious look"; "a serious young man"; "are you serious or joking?"; "Don't be so serious!"

   Synonyms:
   unplayful, severe, grave, good, life-threatening, sober, dangerous, grievous

   Antonyms:
   flighty, trivial, scatterbrained, light, lightheaded, light-headed, empty-headed, head-in-the-clouds, noncritical, silly, dizzy, flippant, flyaway, featherbrained, noncrucial, airheaded, frivolous, giddy, nonintellectual, easy, light-minded, unimportant, idle

2. seriousadjective

   of great consequence

   "marriage is a serious matter"

   Synonyms:
   unplayful, severe, grave, good, life-threatening, sober, dangerous, grievous

   Antonyms:
   dizzy, light, light-headed, empty-headed, flyaway, scatterbrained, giddy, lightheaded, head-in-the-clouds, nonintellectual, unimportant, flighty, light-minded, idle, flippant, airheaded, featherbrained, silly, trivial, noncrucial, easy, noncritical, frivolous

3. dangerous, grave, grievous, serious, severe, life-threateningadjective

   causing fear or anxiety by threatening great harm

   "a dangerous operation"; "a grave situation"; "a grave illness"; "grievous bodily harm"; "a serious wound"; "a serious turn of events"; "a severe case of pneumonia"; "a life-threatening disease"

   Synonyms:
   severe, sober, wicked, stark, unsafe, terrible, hard, spartan, stern, heavy, unplayful, weighty, monstrous, grave, good, grievous, atrocious, sedate, flagitious, life-threatening, dangerous, knockout, austere, heartbreaking, heartrending, solemn

   Antonyms:
   light-headed, empty-headed, giddy, lightheaded, featherbrained, easy, dizzy, airheaded, flighty, flyaway, noncritical, head-in-the-clouds, trivial, frivolous, silly, unimportant, noncrucial, light, nonintellectual, flippant, light-minded, scatterbrained, idle

4. good, seriousadjective

   appealing to the mind

   "good music"; "a serious book"

   Synonyms:
   dear, good, beneficial, unplayful, in effect(p), unspoiled, skillful, sound, secure, effective, severe, upright, salutary, in force(p), skilful, practiced, dependable, estimable, life-threatening, grievous, expert, just, grave, dangerous, sober, proficient, full, honest, respectable, undecomposed, unspoilt, ripe, safe, adept, honorable, well(p), right, near

   Antonyms:
   flighty, featherbrained, light-minded, scatterbrained, dizzy, flyaway, flippant, empty-headed, easy, noncritical, idle, airheaded, silly, noncrucial, lightheaded, light, head-in-the-clouds, unimportant, giddy, nonintellectual, light-headed, trivial, frivolous

5. unplayful, serious, soberadjective

   completely lacking in playfulness

   Synonyms:
   severe, sombre, drab, grave, good, sedate, unplayful, life-threatening, sober, somber, dangerous, grievous, solemn

   Antonyms:
   dizzy, noncrucial, silly, giddy, flighty, lightheaded, empty-headed, flyaway, scatterbrained, flippant, light-minded, head-in-the-clouds, featherbrained, airheaded, light, trivial, unimportant, nonintellectual, light-headed, easy, noncritical, idle, frivolous

6. seriousadjective

   requiring effort or concentration; complex and not easy to answer or solve

   "raised serious objections to the proposal"; "the plan has a serious flaw"

   Synonyms:
   unplayful, severe, grave, good, life-threatening, sober, dangerous, grievous

   Antonyms:
   light-headed, unimportant, nonintellectual, lightheaded, trivial, empty-headed, noncrucial, light, head-in-the-clouds, silly, flighty, noncritical, flippant, giddy, scatterbrained, flyaway, dizzy, light-minded, easy, featherbrained, frivolous, idle, airheaded

Dictionary of English SynonymesRate these synonyms:0.0 / 0 votes

1. seriousadjective

   Synonyms:
   grave, solemn, sedate, staid, sober, earnest, demure, not gay, not sportive or jocose

2. seriousadjective

   Synonyms:
   important, weighty, great, momentous

Synonyms, Antonyms & Associated WordsRate these synonyms:0.0 / 0 votes

1. seriousadjective

   Synonyms:
   grave, earnest, thoughtful, solemn, staid, sober, demure, saturnine, momentous, important, weighty, grave, dangerous, alarming, critical

PPDB, the paraphrase databaseRate these paraphrases:0.0 / 0 votes

1. List of paraphrases for "serious":

   grave, severe, seriously, acute, major, gross, dangerous, earnest, heavy, grievous, significant, dire, deep, graves, great, conscientiously, gravely, seriousness, critical, important, profound, considerable, severely, bad, earnestly, big, gravity, substantial, large, egregious, strong, huge, jad, real, difficult

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How to use serious in a sentence?

1. Emily Odesser:

   It never got to the point where I made any attempts or serious plans but I remember it was kind of this morbid obsession, when I was walking to school and I would see a car drive by me I would be like ‘Oh if I just go in front of that I can end this’, [or] I would see a knife in the kitchen and be like ‘If I just use this I could end it.’.

2. President Obama:

   A little bit later you're going to hear from a guy who I hear has been talking about launching a potential political career, you may have heard of this, Kanye is thinking about running for Speaker of the House. It couldn't get any stranger...But in case Kanye is serious about this whole POTUS thing -- or as he calls it 'peezy' [West's nickname is Yeezy] -- I do have advice for him.

3. Min-Liang Tan:

   It's a serious business right now, so we're heavily investing in it.

4. Ross Douthat:

   It may be that this conflict has only just begun, and it may be that as with previous conflicts in Church history, it will eventually be serious enough to end in real schism, a permanent parting of the ways.

5. Karen Corrigan:

   Obviously, if something more serious was coming on, I'd go to urgent care, or get a new physician.