adjective se·ri·ous \ˈsir-ē-əs\

: having an important or dangerous possible result

: involving or deserving a lot of thought, attention, or work

: giving a lot of attention or energy to something

Full Definition of SERIOUS

:  thoughtful or subdued in appearance or manner :  sober <a quiet, serious girl>
a :  requiring much thought or work <serious study>
b :  of or relating to a matter of importance <a serious play>
a :  not joking or trifling :  being in earnest <a serious question>
b archaic :  pious
c :  deeply interested :  devoted <a serious musician>
a :  not easily answered or solved <serious objections>
b :  having important or dangerous possible consequences <a serious injury>
:  excessive or impressive in quality, quantity, extent, or degree <serious stereo equipment> <making serious money> <serious drinking>
se·ri·ous·ness noun

Examples of SERIOUS

  1. You sound terrible. It's just a bad cold. Nothing serious.
  2. For my brother, not going to college was a serious mistake.
  3. Crime is a serious problem in this neighborhood.
  4. The team is a serious contender for the championship.
  5. If you want to quit smoking, you have to make a serious effort.
  6. They had a serious conversation about their relationship.
  7. a serious novel about modern life
  8. The story raises serious questions about our system of justice.
  9. Dog shows are a serious business.
  10. She is a serious cyclist who rides 200 miles each week.

Origin of SERIOUS

Middle English seryows, from Anglo-French or Late Latin; Anglo-French serious, from Late Latin seriosus, alteration of Latin serius weighty, serious; probably akin to Old English swǣr heavy, sad
First Known Use: 15th century

Synonym Discussion of SERIOUS

serious, grave, solemn, sedate, staid, sober, earnest mean not light or frivolous. serious implies a concern for what really matters <a serious play about social injustice>. grave implies both seriousness and dignity in expression or attitude <read the proclamation in a grave voice>. solemn suggests an impressive gravity utterly free from levity <a sad and solemn occasion>. sedate implies a composed and decorous seriousness <remained sedate amid the commotion>. staid suggests a settled, accustomed sedateness and prim self-restraint <a quiet and staid community>. sober stresses seriousness of purpose and absence of levity or frivolity <a sober look at the state of our schools>. earnest suggests sincerity or often zealousness of purpose <an earnest reformer>.

Rhymes with SERIOUS

SERIOUS Defined for Kids


adjective se·ri·ous \ˈsir-ē-əs\

Definition of SERIOUS for Kids

:  not joking or funny <a serious drama>
:  being such as to cause distress or harm <a serious accident>
:  thoughtful or quiet in appearance or manner <a serious person>
:  requiring much thought or work <a serious task>
se·ri·ous·ness noun

Synonym Discussion of SERIOUS

serious, solemn, and earnest mean not funny or not playful. serious means being concerned or seeming to be concerned about really important things. <He's a serious student.> solemn is used for dignity along with complete seriousness. <The preacher is always very solemn.> earnest means that someone is sincere and has serious intentions. <She's an earnest, diligent student.>
Medical Dictionary


adjective se·ri·ous \ˈsir-ē-əs\

Medical Definition of SERIOUS

:  having important or dangerous possible consequences <a serious injury>


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