What is life?

I was following a post on the origins of life and began thinking about that age-old question, what is life? Koshland gave us the "P(rogram), I(mprovisation), C(ompartmentalization), E(nergy), R(egeneration), A(daptability), S(eclusion)" definition. Has anyone developed a simpler one? Discussions on the topic would be easier if we had an accurate, simpler definition.

He called them the seven pillars of life. Here is basically what they are;
1. Program - Life has some kind of organized plan to operate through such as the nucleic acid and amino acid system.
2. Improvization - A living thing can change its plan in response to its environment.
3. Compartmentalization - A living thing must have separated spaces for necessary reactions to prevent other ingredients from messing up the reactions.
4. Energy - Living things require energy.
5. Regeneration - Living things must have a system to repair or restore damaged or lost components or processes.
6. Adaptability - A living thing responses to changes, dangers, and needs.
7. Seclusion - Chemical pathways must be separated.Yes, I think Origin of Life would be an appropriate category.