My first real dictionary was the Collins Concise English Dictionary. Odd though it may seem, I still remember two of the definitions. It defined "universe" as, "the total aggregate of all space and matter"; and "time", as, memorably: "the continuous passage of events from a state of potentiality in the future, into a state of actuality in the present, to a state of finality in the past." I've never encountered either word defined in quite the same way. I wonder where that dictionary is now.