:::You are still arguing that we need to adopt a single definition of matter as the "correct" definition in this article. That would be a violation of NPOV, since there are different equally valid definitions. Sometimes the term matter is used to distinguished from light, at other times matter is used to distinguish from spacetime and includes anything that "exists in spacetime" including light. The latter definition by the way is much closer to Aristotle's concept of matter. (His context was the discussion whether empty space was nothing).