The experience, sense, intuition, or knowing of a reality that is deeper, more meaningful,
more unified, more vast than the reality that is known on a day to day basis, and from which there is no separation.
The recognition that while non-separateness describes reality, distinct and apparently separate forms arise within it. The further recognition that form and reality are not separate even though they may appear to be, even as waves are not separate from the ocean.
The body of practices, teachings, teachers, traditions that may be accessed in the pursuit of understanding reality.
Beyond that, the perfect knowing of reality, such that there is not even a knower.