pronoun: 1. every single thing or every particular of an aggregate or total; all. 2. something extremely important: This news means everything to us. 3. the entirety of a specified or implied class: she lost everything in the War. 4. a great deal, esp of something very important: she means everything to me. 5. a. all that exists. b. all that relates to the subject. 6. all that is important: you mean everything to me. 7. all sorts of other things —used to indicate related but unspecified events, facts, or conditions: all the pains and colds and everything— E. B. White. noun: 1. something that is extremely or most important: Money is his everything. Examples: People will buy everything she paints. I didn't agree with everything he said. Related Words: all, business, lot, aggregate, complex, sum, total, universe, whole. Origin: Middle English word dating back to 1350–1400; see origin at every, thing1. Source 1, Source 2.