Love Is....

There are all types of love.  Love for that special someone, parents, children, pets, hobby, occupation, etc.  Each type of love probably has its own unique elements, but are there certain elements that are consistent in all types of love?    Love is most likely unique to every individual as well.

My basic definition of love would be that it is a feeling of fulfillment, and without it, there would be an aching void. 

So, what is your basic definition of  love?   

(If TL comments on this post, I think I'd fall out of my chair)