noun · 8 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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UK:/ˈpliːnəm/
US:/ˈplɛnəm/
US:/ˈplinəm/
US:Recorded audio is listed in the source snapshot.
rhymes with -iːnəm
rhymes with -ɛnəm
CMU ARPABET:P L EH1 N AH0 M
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A space that is completely filled with matter.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
7
noun
Meaning 7
an enclosed space in which the air pressure is higher than outside
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: enclosure
8
noun
Meaning 8
a meeting of a legislative body at which all members are present
Definition source: Princeton WordNet 3.0
Examples
the plenum will vote on all tax increases
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: meeting, group meeting
History
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.
Across languages
Translations
41 source translations are retained for this English entry.
Chinese Mandarin:
充滿 /充满
(chōngmǎn)
— a space that is completely filled with matter
Chinese Mandarin:
充實 /充实
(chōngshí)
— a space that is completely filled with matter
Finnish:
täysi tila
— a space that is completely filled with matter
Japanese:
充実
(jūjitsu)
— a space that is completely filled with matter
Latin:
plēnum
— a space that is completely filled with matter
Bulgarian:
пълнота́
(pǎlnotá)
— a state of fullness, a great quantity (of something)
Chinese Mandarin:
充滿 /充满
(chōngmǎn)
— a state of fullness, a great quantity (of something)
Chinese Mandarin:
充實 /充实
(chōngshí)
— a state of fullness, a great quantity (of something)
Japanese:
充実
(jūjitsu)
— a state of fullness, a great quantity (of something)
Russian:
полнота́
(polnotá)
— a state of fullness, a great quantity (of something)
Belarusian:
пле́нум
(pljénum)
— a legislative meeting (especially of the Communist Party) in which all members are present
Bulgarian:
пле́нум
(plénum)
— a legislative meeting (especially of the Communist Party) in which all members are present
Chinese Mandarin:
全體會議 /全体会议
(quántǐ huìyì)
— a legislative meeting (especially of the Communist Party) in which all members are present
Chinese Mandarin:
全會 /全会
(quánhuì)
— a legislative meeting (especially of the Communist Party) in which all members are present
Finnish:
täysistunto
— a legislative meeting (especially of the Communist Party) in which all members are present
Finnish:
yleiskokous
— a legislative meeting (especially of the Communist Party) in which all members are present
German:
Plenum
— a legislative meeting (especially of the Communist Party) in which all members are present
Greek:
ολομέλεια
(oloméleia)
— a legislative meeting (especially of the Communist Party) in which all members are present
Japanese:
総会
(sōkai)
— a legislative meeting (especially of the Communist Party) in which all members are present
Japanese:
全体会議
(zentaikaigi)
— a legislative meeting (especially of the Communist Party) in which all members are present
Kazakh:
алқалық мәжіліс
(alqalyq mäjılıs)
— a legislative meeting (especially of the Communist Party) in which all members are present
Kazakh:
алқалық жиналыс
(alqalyq jinalys)
— a legislative meeting (especially of the Communist Party) in which all members are present
Kazakh:
пленум
(plenum)
— a legislative meeting (especially of the Communist Party) in which all members are present
Korean:
총회
(chonghoe)
— a legislative meeting (especially of the Communist Party) in which all members are present
Korean:
전원회의
(jeonwonhoe'ui)
— a legislative meeting (especially of the Communist Party) in which all members are present
Macedonian:
пленум
(plenum)
— a legislative meeting (especially of the Communist Party) in which all members are present
Norwegian Bokmål:
plenum
— a legislative meeting (especially of the Communist Party) in which all members are present
Norwegian Nynorsk:
plenum
— a legislative meeting (especially of the Communist Party) in which all members are present
Persian:
پلنوم
(plenom)
— a legislative meeting (especially of the Communist Party) in which all members are present
Polish:
plenum
— a legislative meeting (especially of the Communist Party) in which all members are present
Russian:
пле́нум
(plénum)
— a legislative meeting (especially of the Communist Party) in which all members are present
Spanish:
pleno
— a legislative meeting (especially of the Communist Party) in which all members are present
Ukrainian:
пле́нум
(plénum)
— a legislative meeting (especially of the Communist Party) in which all members are present
Chinese Mandarin:
高壓 /高压
(gāoyā)
— enclosed space having greater than atmospheric pressure
Finnish:
ylipainetila
— enclosed space having greater than atmospheric pressure
Japanese:
プレナム
(purenamu)
— enclosed space having greater than atmospheric pressure
Finnish:
alakaton ontelo
— space above a false ceiling used for cables, ducts etc.
Finnish:
alakaton yläpuolinen tila
— space above a false ceiling used for cables, ducts etc.
Finnish:
alakaton päällä oleva tila
— space above a false ceiling used for cables, ducts etc.
Japanese:
プレナム
(purenamu)
— space above a false ceiling used for cables, ducts etc.
Japanese:
プレナム
(purenamu)
— type of network cabling which satisfies a given plenum rating
