Definitionen
1.NounA space that is completely filled with matter.
2.NounA state of fullness, a great quantity (of something).
3.NounA legislative meeting (especially of the Communist Party) in which all members are present.
4.NounAn enclosed space having greater than atmospheric pressure.
5.NounThe space above a false ceiling used for cables, ducts etc.
6.NounA type of network cabling which satisfies a given plenum rating for the purpose of fire safety.