The phrase "extensive deliberations" means having long and careful discussions or thinking deeply about something before making a decision or taking action. Full definition
The resolutions read: «After extensive deliberations with the Reconciliation Committee, we, party delegates from Lagos and Ogun States, arrived at the following resolutions: (dailypost.ng)
Extensive deliberations at various levels of the Commission and input from broad consultations with stakeholders, including PWDs, led to the development of the second Strategic Plan, covering the current electoral cycle (2017 - 2021). (inecnews.com)
«The new school food standards are just one part of the School Food Plan and are the result of extensive deliberations, consultation and testing. (schoolfoodplan.com)