The word "Deva" comes from the Sanskrit language, and means "a being of brilliant Light" and is used to indicate non-physical beings, or nature spirits. Devas have an intrinsic knowledge of cosmic patterns, relationships, and natures harmonies. The consciousness of the devas is directed towards creative expansion while always conscious of their cosmic environment.
They do not have form as we understand form in the physical world. In their, astral realm they are like fluidic open vortexes of cosmic consciousness. Thus we will see them in a more or less human form, but in essence they are only vortexes of energies.