Slaughterhouse's Meaning of Life (ironic)
Slaughterhouse's meaning of life is that life is purposeless, along with massacres. The Tralfamadorians believe that there is no why. Billy asks them "why me" and the Tralfamadorians have responded "Why you? Why us for that matter? Why anything? Because this moment simply is." What we can infer is that even these fourth dimensional beings can't answer this question that we all have asked. And they conclude that in fact there is no answer to why Billy, just as their is no answer to the most fundamental questions like why life exists and why we strive to conserve it. The Tralfamadorians say that like how bugs are trapped in Amber, we are trapped in this moment in time. There is no why for a given circumstance just that it that circumstance is. So Vonnegut's Slaughterhouse 5 tells us that there is no definite meaning to life, at least not one that fourth dimensional beings and below can discover.