What Does Being Human Mean?

What does it mean to be a human? Is it that we have thumbs? Well if so, then some of our primates are humans too. I feel that we as humans have the mind that we can love, think, and understand other things that animals and other beings can't. Humans have an edge over everything; because we can think and comprehend what others say and do. Of course other animals can too, but we can feel what others do and sense what others are going to do. There is nothing that can explain in full what being a human means, but to me it means that we can love each other with everything we have and be willing to die for the one that we love.