obsession

The quality of being obsessed; an unshakeable feeling that one topic or activity must be pursued above other interests.uncountable

• My obsession with rugby resulted in me spending years following the sport.

An idea that engenders a compulsive or irrational preoccupation, or the preoccupation thereby engendered.countable

• The downfall of the chairman is an obsession that consumes Laura's time.

An activity or entity that inspires a compulsive and potentially unhealthy fixation, or the fixation thereby inspired.countable

• Editing Wikipedia started as a hobby, but it's turned into a complete obsession of mine.
• His current obsession is getting that law passed.

Influence or control by evil spirits without possession.uncountable

• They should see that a perception of their identification with the Victor of Calvary is absolutely necessary if they are to constantly and victoriously resist the obsession of evil spirits.