WordWeb Online

1. An earnest and sincere feeling
   - earnestness, sincerity
    
2. The quality of arousing fear or distress
   "he learned the seriousness of his illness"
   - distressfulness
    
3. The trait of being serious
   "a lack of solemnity is not necessarily a lack of seriousness"
   - earnestness, serious-mindedness, sincerity

Derived forms: seriousnesses

See also: frivolous, serious

Type of: badness, gravity, severeness, severity, solemnity, trait

Antonym: frivolity

Encyclopedia: Seriousness