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.
Influence acting unexpectedly or temporarily on the mind; sudden motive or influence; impulse.
The act of impelling or driving onward, or the state of being impelled; the sudden or momentary agency of a body in motion on another body; also, the impelling force, or impulse.