A complete obsession or absorption in a subject or hobby to a point where a person appears to completely tune out their surroundings and where the person repeatedly returns to said subject or material.
The quality of being obsessed.
An idea that engenders a compulsive or irrational preoccupation, or the preoccupation thereby engendered.
Influence or control by evil spirits without possession.
An activity or entity that inspires a compulsive and potentially unhealthy fixation, or the fixation thereby inspired.