Synonyms for serious
ˈsɪər i əsse·ri·ous

Wiktionary(4.00 / 1 vote)Rate these synonyms:

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 Antonyms(0.00 / 0 votes)Rate these synonyms:

1. serious

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

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

Princeton's WordNet(5.00 / 1 vote)Rate these synonyms:

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 Synonymes(0.00 / 0 votes)Rate these synonyms:

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 Words(0.00 / 0 votes)Rate these synonyms:

1. seriousadjective

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

PPDB, the paraphrase database(0.00 / 0 votes)Rate these paraphrases:

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. Jeff Sessions:

   We are going to step up our effort and already are stepping up our efforts on all leaks, this is a matter that's gone beyond anything I'm aware of. We have professionals that have been in the security business of the United States for many years that are shocked by the number of leaks and some of them are quite serious. So yes, it is a priority. We've already begun to step up our efforts and whenever a case can be made, we will seek to put some people in jail.

2. Isaac Bleaman:

   The Yiddish is laughably bad. That's unfortunate, because an outbreak of measles is a serious matter.

3. Leslie Morissette:

   We spent two years pretty much in and out of the hospital, watching your child battle a serious illness is the worst possible thing a family can go through.

4. Kristin Simpson:

   I just felt like nobody was taking me seriously at all and that it was way more serious than anybody was letting it out to be.

5. Kendall Coffey:

   ...Violence toward a U.S. citizen - like those who have been cruelly murdered by ISIS – could potentially provide jurisdiction for U.S. prosecution. If individuals can be identified who knowingly made oil purchases funding the terrorist agenda of ISIS, those individuals might be considered for very serious federal crimes, even though there could be complicated issues of arrest and extradition.