Obsession
Obsession , noun
[Latin obsessio: compare French obsession.]
1.
The act of besieging. [archaic] — Johnson
2.
The state of being besieged; -- used specifically of a person beset by a spirit from without. [archaic] — Tylor
Whether by obsession or possession, I will not determine.
3.
An excessive preoccupation of the thoughts or feelings; the persistent haunting or domination of the mind by a particular desire, idea, or image.
4.
Any driving motive; a compelling goal; -- not necessarily implying a negative judgment, as does sense 3; as, the coach was obsessed with winning the state championship
5.
Something that causes an obsession{3}.
6.
The state of being obsessed.