Plenary is an adjective related to the noun plenum carrying a general connotation of fullness.
Plenary may also refer to:
Plenary session or meeting, the part of a conference when all members of all parties are in attendance Plenary speaker, a speaker at a plenary session; distinguish from a sectional speaker Plenary power or plenary authority, the complete power of a governing body Plenary council, one of various councils of the Catholic Church Plenary indulgence, a type of religious indulgence Plenary Group, an Australian company