ZPG (Zero Population Growth) Posted on 30th December 201519th October 2020 by ThePD (The Project Definition) ZPG stands for Zero Population Growth. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Business and tagged people, term. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.