Plenum
noun ·Common ·High school level
Definitions
- 1 A space that is completely filled with matter.
"The idea was that a thing could only move into an empty place, and that, in a plenum, there are no empty places."
- 2 an enclosed space in which the air pressure is higher than outside wordnet
- 3 A state of fullness, a great quantity (of something). figuratively
"He lay on the long stone slant down to the slapping waves, his denim shorts, sneakers, and socks under his head for a pillow, feeling the splendour of distance in all directions, the liquid silence, the plenum of aloneness."
- 4 a meeting of a legislative body at which all members are present wordnet
- 5 A legislative meeting (especially of the Communist Party) in which all members are present.
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- 6 An enclosed space having greater than atmospheric pressure.
- 7 The space above a false ceiling used for cables, ducts etc.
- 8 A type of network cabling which satisfies a given plenum rating for the purpose of fire safety.
Antonyms
All antonymsExample
More examples"The idea was that a thing could only move into an empty place, and that, in a plenum, there are no empty places."
Etymology
From Latin plēnum n (“space filled with matter”), from plēnus (“full”). The sense of "legislative meeting" is a semantic loan from Russian пле́нум (plénum, “plenary session”), from the same Latin source.
Related phrases
More for "plenum"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.