a meeting for all members attending a conference, either at the beginning to discuss general issues or at the end to announce progress
The keynote address was part of the plenary session.
A plenary session features a keynote address on “unleashing creativity” from the founder of a promotions site called ePrize.
Party statutes require a plenary session of the Central Committee at least four times a year (see fig. 9).
There was a concerted gasp at that; about half the plenary session were absolutely sure that he was.
The resolution of the Commission was cheerfully passed in a plenary session of the Diet.
The text of the document read by President Wilson at the plenary session, opening with a preamble, is here given in full.