Well since there’s no real definition that leaves room for people to come up with their own. My interpretation of what the definition would be based on some small knowledge of the subject is that you are in a permanent state of complete contentedness, without the need or desire for anything other than basic survival. I am not enlightened, no one who says they are either. Having the need to express to other people that you are enlightened seems like an ego driven need to me. I could see it as somewhere in the realm of complete control of the unconscious from the conscious mind. It seems like the type of thing that needs to be maintained but once attained maintenance would be second nature. It seems like it would just be how you are now, after years of progressively going in that direction. Imo your thoughts are a sort of range of options fed to the conscious mind from the unconscious based on perception and experience. As to what started the immortal life entity which in my mind is synonymous with consciousness and intelligence that has replicated itself to the point we are now, I’m not sure. But ultimately that’s where thoughts came from, I read a thing about how some theoretical physicists think consciousness could be a different dimension.