lost in thought; showing preoccupation; "an absent stare"; "an absentminded professer"; "the scatty glancing quality of a hyperactive but unfocused intelligence"
Someone who is abstracted is thinking so deeply that they are not fully aware of what is happening around them. The same abstracted look was still on his face. = preoccupied + abstractedly ab·stract·ed·ly She nodded abstractedly. not noticing anything around you because you are thinking carefully about something else