Define love

I was recently invited to join a group on facebook called "I bet I can find 1,000,000 people who believe in gay rights". The picture to the left is the facebook photo to represent the group. Now, I could be wrong... but shouldn't it be all about not defining love? Aren't we supposed to let love flourish into whatever it comes to be? As Siddhartha Gautama has said, Define me and Limit me.