full, complete, plenary, replete mean containing all that is wanted or needed or possible. full implies the presence or inclusion of everything that is wanted or required by something or that …

PLENARY definition: full; complete; entire; absolute; unqualified. See examples of plenary used in a sentence.

PLENARY meaning: 1. A plenary meeting is one at which all the members of a group or organization are present…. Learn more.

A plenary session or plenary meeting is one that is attended by everyone who has the right to attend.

There are eight meanings listed in OED's entry for the word plenary, two of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Plenary session All members of a conference are expected to attend plenary sessions A plenary session or plenum is a session of a conference or deliberative assembly in which all parties or …

Although the adjective plenary can be used to describe anything that is full or complete, it most often describes a full meeting session, as in a political meeting or a board meeting.