Isn't it true that by the truth of infinite or ever-expanding space, (or no finite or fixed space) space, as conceived by the human brain-mind, is nothing but the gap between two or more objects or reference points; and by the same token, there is no absolute space or fixed universe?
(If you say 'this much' is universe, or even multiverses, you have to tell me what is beyond that.)
And is that why Brahman (the infinite, all pervading, the 'anywhere and everywhere existence-knowledge-bliss or  Satchitananda) is indefinable.