The phrase "earlier editions" refers to previous versions or copies of a book, magazine, or any published material. It means the versions that came out before the most recent or current one. Full definition
In a change from earlier editions, there will be NO in - person applications accepted. (hamptonsarthub.com)
Funny script but lacking all the visual gags that made earlier editions great. (crankycritic.com)
Findings are detailed in a research paper appearing this week (Dec. 14) in the online early edition of Proceedings of the National Academy of Sciences. (sciencedaily.com)