A virus is like a protein packet and is much simpler than a bacteria, which is simpler than a single cell. A virus is probably composed of only about 10,000 strains of DNA. It is organic matter and it can absorb energy and reproduce, so it must be life if defining life by its composition and action, but the simplest form that I know of.
I dread these semantics debates and this goes way off topic. My apologies to those peoples who feel that this post is a violation of the rules. Any moderator should feel free to remove this post if they wish.
To begin, most biologist believe that life begins on the cellular level. The following list was taken from
http://assets.cambridge.org/97805216/80547/excerpt/9780521680547_excerpt.pdf and edited for length.
1. Nutrition - "Living things take in materials from their surroundings that they use for growth or to provide energy."
2. Respiration - "Respiration is the release of energy from food substances in all living cells."
3. Movement - "All living things move."
4. Excretion - "All living things excrete. As a result of the many chemical reactions occurring in cells, they have to get rid of waste products which might poison the cells."
5. Growth - "Growth is seen in all living things. It involves using food to produce new cells."
6. Reproduction - "All living organisms have the ability to produce offspring."
7. Sensitivity - "All living things are able to sense and respond to stimuli around them such as light, temperature, water, gravity and chemical substances."
We can see from this list that a virus fails every requirement on this list. This will be my last post on the meaning of life but in your previous post there are several factual errors.