One can simply say that it does not involve any synthetic fertilizers or pesticides which promotes health and wellness.
Being more specific, by adapting the International Federation of Organic Agriculture Movements (IFOAM) Principles of Organic Agriculture, we could quote:
1. The Principle of Health – Organic Agriculture should sustain and enhance the health of soil, plant, animal, human and planet as one and indivisible.
2. The Principle of Ecology – Organic Agriculture should be based on living ecological systems and cycles, work with them, emulate them and help sustain them.
3. The Principle of Fairness – Organic Agriculture should build on relationships that ensure fairness with regard to the common environment and life opportunities.
4. The Principle of Care – Organic Agriculture should be managed in a precautionary and responsible manner to protect the health and well-being of current and future generations and the environment.
Complex definitions and principles which I think are easier understood if we just call it the farming methods our forefathers used before all the synthetic stuff came along.
For us, organic is all above, plus true love for nature and a deep passion for food and taste.