Inattentive to surrounding objects; absent in mind.

lost in thought; showing preoccupation; "an absent stare"; "an absentminded professer"; "the scatty glancing quality of a hyperactive but unfocused intelligence"

Abstract; abstruse; difficult.

summarized

taken out of or separated from; "possibility is...achievability, abstracted from achievement"- A.N.Whitehead

Separated or disconnected; withdrawn; removed; apart.

Separated from matter; abstract; ideal.