What is the definition of reality?
Reality is subjective so there is no single definition. Everyone has to decide what they consider real (and so worth caring about) and then act on that basis. i.e. A physopath doesn’t really beleive that other people are real and treats them accordingly – however such a person (not beleiving other to be real) can’t then complain if those figments of their imagination then locked them up in a padded cell in a straight jacket !! Alternatively:- The definition of reality is (as are all definitions) the descriptive words, phrases, sentences and paragraphs used to express the meaning of that word using words and concepts other than itself.
