serious

1. Concerned with work or important matters rather than play or trivialities (synset 302125659)
   "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!"
   tells us about: earnestness, serious-mindedness, seriousness, sincerity - the trait of being serious
   similar to:

   • earnest, sincere, solemn - characterized by a firm and humorless belief in the validity of your opinions
   • grave, sedate, sober, solemn - dignified and somber in manner or character and committed to keeping promises
   • overserious - excessively serious
   • real - not to be taken lightly
   • serious-minded, thoughtful - acting with or showing thought and good sense
   • sobering - tending to make sober or more serious
   • solid - of a substantial character and not frivolous or superficial
2. Of great consequence (synset 301282721)
   "marriage is a serious matter"
   similar to: important, of import - of great significance or value
3. Causing fear or anxiety by threatening great harm (synset 300654061)
   "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"
   similar to: critical - being in or verging on a state of crisis or emergency
   same as: dangerous, grave, grievous, life-threatening, severe
4. Appealing to the mind (synset 301336429)
   "good music"; "a serious book"
   similar to: intellectual - appealing to or using the intellect
   same as: good
5. Completely lacking in playfulness (synset 302130695)
   tells us about: fun, playfulness - a disposition to find (or make) causes for amusement
   same as: sober, unplayful
6. Requiring effort or concentration;
   Complex and not easy to answer or solve (synset 300751972)
   "raised serious objections to the proposal"; "the plan has a serious flaw"
   similar to: difficult, hard - not easy; requiring great physical or mental effort to accomplish or comprehend or endure

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