- Deep in thought - Lost in thought - Meditative - Thoughtful - Thoughtful stationery items I've supplied - Thoughtful VIP seen out and about - Thoughtful, sober, or sad; employed in serious reflection;
given to, or favorable to, earnest or melancholy musing.
- Lost in thought - of Abstract - Separated or disconnected; withdrawn; removed; apart. - Separated from matter; abstract; ideal. - Abstract; abstruse; difficult. - Inattentive to surrounding objects; absent in mind.