Definitive Estimate Posted on 7th November 20157th November 2023 by ThePD (The Project Definition) A Definitive Estimate refers to the Detailed Estimate. Related Definitions in the Project: The Cost Estimate (Estimation) 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 Controls and tagged construction, cost, estimate, 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.