Its morning and you already have me questioning my existence lol. Seriously I wouldn't hurt my brain over it. I'll just enjoy my reality.

I think it's everyone's view of the world so there as many realities as there are people. I think truth is the aggregate of all the realities. That probably comes from Hegel.

Other than that, it's the thing that can bite sometimes.

What it is: complex, amazing, governed by scientific principles of which we only comprehend a tiny sliver. It is what physically IS. Reality discovery is the "Holy Grail" of science.

At least as important a question is what reality is not. It does not equal our perceptions of it, because we are flawed and easily misled. It also is not "Truth," which is a value-laden term that varies with our personal values, priorities, and perspectives. ..As in "find YOUR truth."

Reality is the natural order which is generally assumed to be intersubjectively present for us all, and apprehending it accurately is the goal of constantly developing a better and better mental model of that external world. What "better" looks like in this context is, to boil it down to something simple, is "fewer surprises". That is, following one's understanding of how reality works should lead to expected outcomes more often than without that understanding. If your understanding of reality often fails to explain or predict experienced reality then it likely needs revision and improvement.

There is no such thing as 100% objective truth and even if there were, our brains are extremely sloppy, noisy and imperfect ... so understanding reality is always a progressive work-in-progress involving constant refinement and both individual and group effort.

Religion, generally, is an attempt to short-circuit this effortful process of continuous improvement using canned abstractions and/or metaphors as a basis.

This is a dream, nothing more.
Reality is post death, or Eternity.

"Reality is nothing but a collective hunch." -- Jane Wagner

Reality can be sensed.

That which is real can be perceived and is capable of being measured.
That which cannot is not, or is irrelevant to us and so may as well not be.

Repetition is the basis of reality