What is No-otherness?
The original term: Advaita
The Sanskrit term “Advaita” has been translated into English as “non-duality”.
Advaita literally means not-two.
In turn, a more accurate translation of Advaita is “no otherness”.
The Meaning of No-otherness
The otherness you feel that keeps you bound in the experience of being a separate-person, experiencing a world apart from yourself, this is not the reality it seems to be. Your deepest reality, Reality itself, is One, without a second, unchanging as it is.
No-otherness is your real nature.
No-otherness is who you really are.
Abiding realization of your true self as No-otherness is Enlightenment.
Why use the term “No-otherness” instead of the more established term “non-duality”?
When you hear the term “non-duality”, it evokes the sense of some kind of philosophy, perhaps even very deep philosophy of life. It evokes the idea of something, some thing, a concept, an esoteric concept, a philosophy or world view in this case.
However, the translation of the term “Advaita” as “non-duality’ misses the live Truth of what the word “Advaita” is pointing to.
Advaita is pointing to the present-continuous experiencing of Reality as Reality. Hence the use of the better translation for “Advaita”, namely, “No-otherness.”

A note of gratitude. I received the gift of this clear translation from the Satsangs with Sri Nochur Venkataraman, a living Master. You can see his many incredible works and talks and events here.