It's a question everyone asks and there is usually a debate on that, but I truly believe love can be defined according to what your experience of it was.
I define love as a wonderful feeling you only experience once cause people say love is a one time thing. When some is in love you get to see it on their faces, they tend to smile always, most of them have glowing faces and I also believe love is just a special type of happiness you with that special someone.
I once experienced love but it didn't end like all the other fairy tales.