An aura is a luminous body that surrounds your physical one and reflects your energy field. Learn about the different colors, layers, and meanings of auras, and how to see them with special cameras or techniques. An aura is the subtle energy field that surrounds every living being, including humans, animals, and plants. The aura is not visible to the naked eye, but some people can perceive its energy and light as colors, frequencies, and patterns. AURA definition: 1. a feeling or character that a person or place seems to have: 2. a type of coloured light that…. Learn more.