Is there any such thing as 'absolute reality' in Buddhism?

Numerous philosophical traditions and religious doctrines espouse disparate—and at times, mutually contradictory—conceptions regarding the nature of ‘absolute reality’ or ‘ultimate reality.’ Some schools of thought posit that the entirety of nature constitutes the fundamental substratum of existence, while others ascribe this foundational status to a particular transcendent and personal deity. Still others conceive of absolute reality as an amorphous, omnipresent consciousness that pervades all of existence. With regard to Buddhism, how is ‘absolute reality’ understood within its doctrinal framework? Does Buddhism, in any of its various philosophical interpretations, affirm the existence of an ontologically ultimate reality, or does it reject such a notion altogether?