I also like M. Scott Peck's definition. For me, it means sincerely wanting what's best for the object of my love, even if that means letting them go.
In my family of origin, I learned that love was something you earned. It's taken a long time to unlearn that lesson. Love is selfless, and doesn't expect anything in return. In the height of my codependency, I would have sworn I was selfless and loving, but the real truth is I wanted a return on my "investment." How could he treat me that way "after all I had done for him?" That's not love.
L