Ab initio (ab init) Posted on 1st November 201521st October 2020 by ThePD (The Project Definition) Ab initio (ab init) means from the beginning, the start, or from scratch. 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 Management and tagged contract. 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.