The word Reiki means Universal Life energy. It is defined as being the power that lives and acts in all created matter.
The word has 2 parts:
1.REI: which is the universal, boundless aspect of energy. It is the higher intelligence that guides the creation and functioning of the universe. We can call it God, Universal Mind, Higher Consciousness, Nature or supernatural knowledge or spiritual consciousness.
2.KI: means the same as Chi in Chinese and Prana in Sanskrit. It is also called Life force, orgone, bioplasma. This is the non-physical energy that animates everything alive. As long as something is alive, it has the flow of Ki within the physical body and the energy field around called aura. If the Ki is high and flowing freely, one is joyful, confident, happy, can face things in life and less likely to get sick. If the Ki is low, one feels weak, more likely to get sick, vulnerable to depression, has negative feelings and emotions. We get Ki from the air we breathe, food, sunshine and sleep.Ki can be increased with yoga, breathing exercises (pranayama), meditation and martial arts.