What is the meaning of Plenum?

A space that is completely filled with matter.

A state of fullness, a great quantity (of something).

A legislative meeting (especially of the Communist Party) in which all members are present.

An enclosed space having greater than atmospheric pressure.

The space above a false ceiling used for cables, ducts etc.

A type of network cabling which satisfies plenum-ratings issued by the National Electrical Code. These cables produce less smoke and fumes in the event of fire.

inflection of plēnus:

  1. nominative/accusative/vocative neuter singular
  2. accusative masculine singular

nominative/accusative/vocative neuter singular

accusative masculine singular

a plenum

a plenary session

In public; somewhere (sometime) where and when everyone's allowed: not restricted to a certain group or the like.

a plenum

a plenary session

plenum (a legislative meeting (especially of the Communist Party) in which all members are present)

plenum (members gathered at such a meeting)

Source: wiktionary.org