plenum.
A space that is completely filled with matter.
Meaning & usage
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 a given plenum rating for the purpose of fire safety.
Where this word comes from
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.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.