noun
1. persistent morbid meditation on a problem
• Syn: ↑brooding
• Derivationally related forms: ↑pensive
• Hypernyms: ↑melancholy
2. deep serious thoughtfulness
• Syn: ↑meditativeness, ↑contemplativeness
• Derivationally related forms: ↑contemplative (for: ↑contemplativeness), ↑meditative (for: ↑meditativeness), ↑pensive
• Hypernyms: ↑thoughtfulness
Useful english dictionary. 2012.