Definition of plenum in English:

Share this entry


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'.

Words that rhyme with plenum

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.