Something, such as an object, an idea, or a symbol, that exists, is thought to exist, or is represented as existing. The state or quality of having existence. See Synonyms at existence. The totality of all things that exist. A person: "The artist after all is a solitary being\u201d ( Virginia Woolf). All the qualities constituting one that exists; the essence. One's basic or essential nature; personality. Chiefly Southern U.S., Upper Southern U.S., & New England Because; since. Often used with as or that.