simultaneity
/ˌsaɪməltəˈniɪti/noun
simultaneity is spelled S-I-M-U-L-T-A-N-E-I-T-Y: 12 letters. It appears about once in every 11 million words in written English, the 100,430th most frequent word form (wordfreq, 2021 data). As a noun, simultaneity means “The quality or state of being simultaneous; simultaneousness” (English Wiktionary, September 2026). The plural of simultaneity is simultaneities.
How many letters and syllables are in simultaneity?
| Letters | 12: S-I-M-U-L-T-A-N-E-I-T-Y |
|---|---|
| In writing | about once in every 11 million words; the 100,430th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is simultaneity?
Simultaneity appears about once in every 11 million words in written English, the 100,430th 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 simultaneity?
- UK /ˌsɪməltəˈniːɪti/
- US /ˌsaɪməltəˈniɪti/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-simultaneity.wav, Wikimedia Commons (author and licence on each file's page).
Forms of simultaneity
- simultaneities plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does simultaneity mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The quality or state of being simultaneous; simultaneousness.
- 2
More than one complete musical texture occurring at the same time. This first appeared in the music of Charles Ives, and is common in the music of Conlon Nancarrow, and others.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Simultaneity in Spanish, French, German and Portuguese
In the sense the quality or state of being simultaneous:
| Language | Words |
|---|---|
| French | simultanéité |
| German | Gleichzeitigkeit, Simultanität |
| Portuguese | simultaneidade |
| Spanish | simultaneidad |
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 simultaneity come from?
From simultane(ous) + -ity. By surface analysis, simult(aneous) + -aneity. Compare French simultanéité.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).