Definition of plenum in English:


Line breaks: ple¦num
Pronunciation: /ˈpliːnəm


1An assembly of all the members of a group or committee: the seventh plenum of the Communist Party central committee
[influenced by Russian plenum 'plenary session']
More example sentences
  • He said the next plenum of the central committee, scheduled after local party congresses from August this year to before March next year, will touch upon personnel matters for a new party leadership.
  • Then they hand out little circular mirrors to each member of the plenum.
  • A further plenum of the Central Committee met in Wuhan on 28 November.
2 Physics A space completely filled with matter, or the whole of space so regarded: so long as things move simultaneously into each other’s places, motion is possible in a plenum
More example sentences
  • Imagine fracturing a material body such as a piece of wood, regarded as a plenum (full of matter).
  • A quantum vacuum is more like a plenum than like empty space.
  • The early universe was filled with radiation and a plenum of matter, originally hydrogen and helium, formed from elementary particles in the dense primeval fireball.


late 17th century: from Latin, literally 'full space', neuter of plenus 'full'.

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