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Adjective: serious  seer-ee-us
  1. 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!"
     
  2. Of great consequence
    "marriage is a serious matter"
     
  3. Causing fear or anxiety by threatening great harm
    "a serious wound";
    - dangerous, grave, grievous, severe, life-threatening
     
  4. Appealing to the mind
    "a serious book";
    - good
     
  5. Completely lacking in playfulness
    - unplayful, sober
     
  6. Requiring effort or concentration; complex and not easy to answer or solve
    "raised serious objections to the proposal"; "the plan has a serious flaw"

See also: critical, difficult, earnest, earnestness, fun, grave, hard, important, intellectual, of import, overserious, playfulness, real, sedate, serious-minded, serious-mindedness, seriousness, sincere, sincerity, sober, sobering, solemn, solid, thoughtful

Antonym: frivolous

Encyclopedia: Serious