Vector Posted on 26th December 20152nd May 2021 by ThePD (The Project Definition) A Vector is a quantity (such as velocity) that has magnitude and direction. 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 Engineering and tagged property. 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.