Legitimation or Legitimisation Posted on 5th December 201518th May 2021 by ThePD (The Project Definition) Legitimation or Legitimisation is the process of making something lawful according to the laws of the country. 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 legal. 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.