plenum
/ˈplɛnəm/noun
plenum is spelled P-L-E-N-U-M: 6 letters and 2 syllables. It appears about once in every 2 million words in written English, the 37,943rd most frequent word form (wordfreq, 2021 data). As a noun, plenum means “A space that is completely filled with matter” (English Wiktionary, September 2026). The plural of plenum is plenums or plena.
How many letters and syllables are in plenum?
| Letters | 6: P-L-E-N-U-M |
|---|---|
| Syllables | 2 (from its American pronunciation) |
| In writing | about once in every 2 million words; the 37,943rd most frequent word form |
| Wrong spellings searched | none measured in search |
| Rhymes with | |
| Same letters |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.
How common is plenum?
Plenum appears about once in every 2 million words in written English, the 37,943rd most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce plenum?
- UK /ˈpliːnəm/
- US /ˈplɛnəm/
- US /ˈplinəm/
Plenum has 2 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Persent101-plenum.wav, Wikimedia Commons (author and licence on each file's page).
What rhymes with plenum?
One word on PlainSpell end in the same sounds as plenum from its last stressed vowel (/ɛnəm/):
Spelled with the same letters in another order: lumpen.
Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).
Forms of plenum
- plenums plural
- plena plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does plenum mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A space that is completely filled with matter.
- 2
A state of fullness, a great quantity (of something).
- 3
A legislative meeting (especially of the Communist Party) in which all members are present.
- 4
An enclosed space having greater than atmospheric pressure.
- 5
The space above a false ceiling used for cables, ducts etc.
- 6
A type of network cabling which satisfies a given plenum rating for the purpose of fire safety.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Plenum in Spanish, French, German and Portuguese
In the sense a legislative meeting (especially of the Communist Party) in which all members a:
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does plenum come 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.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).