Astern Posted on 2nd November 201517th July 2021 by ThePD (The Project Definition) Astern means in the back or behind of the ship or aircraft, or opposite of ahead. 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 Procurement and tagged logistic, procurement. 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.