Reality is a concept of things which really exist. In philosophy and science reality has discussed elaborately. This essay concerned this elaboration. In a wider definition, reality includes everything that is and has been, whether or not it is observable or comprehensible. A still broader definition includes everything that has existed, exists, or will exist. Reality is often contrasted with what is imaginary, delusional, (only) in the mind, dreams, what is false, what is fictional, or what is abstract. At the same time, what is abstract plays a role both in everyday life and in academic research.
Reality, Monism, Dualism, Pluralism, Monadism, Atomism, Criticism.