She sat pensive, trying to delve into her memory to uncover the secrets of her past. pensive=adj., thoughtful; deep in thought
His forehead pursed in pensive thought, the young man contemplated life.
The detective stood staring at the opaque window, looking pensive.
Pensive maens deep in thought. Edwad is pensive when he reads people's minds.
She sat with a pensive, faraway look on her pretty face, absorbed with thoughts of their last night together.
The Challenge of Writing a Book's Final Sentence
Visit the Lincoln Memorial in Washington, DC
Ashton Reflects
