The word "plenary" means complete or full, often referring to a gathering or meeting where everyone attends and all important topics are discussed. Full definition
Results of this work are published in peer review journals and were presented by Dr. Dattner at plenary sessions of the Society of Investigative Dermatology. (mindbodygreen.com)
There were no less than 43 full days of plenary sessions for commissioners meeting on their own. (newlawjournal.co.uk)
D. UNDERSTANDING THE CLIMATE SYSTEM AND ITS RECENT CHANGES: This section was addressed in plenary on Wednesday and Thursday with some issues also taken up in informal groups. (enb.iisd.org)