WordNet
adj. deeply absorbed in thought; "as distant and bemused as a professor listening to the prattling of his freshman class"; "lost in thought"; "a preoccupied frown" [syn: bemused, deep in thought(p), lost(p), preoccupied]
Usage examples of "deep in thought".
Enge waited patiently as the scientist, deep in thought watched the river, only half-aware, as the uruketo moved out.
Belisarius frowned, deep in thought, and allowed his jaw to gape with wonder.
So deep in thought was I that it was with a sense of surprise that I found myself at the spot by the stream where I had met the Honourable Joanna earlier.
Neither Cokaze nor his two eldest sons disturbed Cardif, who was deep in thought.
He was deep in thought while his eyes were fastened on the giant orange sun which hung far ahead in space.