n. passion

3- the state or capacity of being acted on by external agents or forces
4aA emotion
4aB (plural) the emotions as distinguished from reason
4b intense, driving, or overmastering feeling or conviction
4c an outbreak of anger
5a ardent affaection
5b a strong liking or desire for or devotion to some activity, object, or concept
5c sexual desire
5d an object of desire or deep interest

I think that as authors we should be striving to balance each of these definitions in our writing.  We want all of them (okay, maybe not 4c or 5c) to be evoked in our readers.  4c and 5c are probably going to pop up in the lives of our characters though.

There’s a whole article on this in the October issue of Writer’s Digest.  I don’t know if it’s online yet or not, but if it is you should go check it out.