"The meaning of life constitutes a philosophical question concerning the purpose and significance of life or existence in general. This concept can be expressed through a variety of related questions, such as "Why are we here?", "What is life all about?", and "What is the meaning of it all?" It has been the subject of much philosophical, scientific, and theological speculation throughout history. There have been a large number of theories to these questions from many different cultural and ideological backgrounds."
Thanks, Wikipedia! http://en.wikipedia.org/wiki/Meaning_of_life
