millennium
/mɪˈlɛnɪəm/noun
millennium is spelled M-I-L-L-E-N-N-I-U-M. The wrong spelling people search most is millenium: about 4,540 Bing searches a month in the United States (September 2025 to August 2026), about 3 in 10 of all searches for the word. Millennium is a noun meaning “A period of time consisting of one thousand years”. The plural of millennium is millennia or millenniums.
How many letters and syllables are in millennium?
| Letters | 10: M-I-L-L-E-N-N-I-U-M |
|---|---|
| Syllables | 4 (from its American pronunciation) |
| In writing | 5.0 times per million words; the 11,198th most frequent word form |
| Wrong spellings searched | 2; the most searched, millenium, about 4,540 Bing searches a month (all of them) |
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); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).
How do you spell millennium?
Millennium is spelled M-I-L-L-E-N-N-I-U-M. 2 wrong spellings are searched or written often enough to measure; together they are about 4 in 10 of the searches for millennium in either form.
Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026). Wrong spellings are taken from Wiktionary entries tagged "misspelling" and its obsolete or nonstandard forms, Wikipedia's Lists of common misspellings and the codespell dictionary, then measured. The proofreader's marks show the change that corrects each one.
How common is millennium?
Millennium appears 5.0 times per million words in written English, the 11,198th most frequent word form in the list. The list counts every capitalisation together, so this includes Millennium, the name.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce millennium?
- /mɪˈlɛnɪəm/
Millennium has 4 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: En-uk-millennium.oga, Wikimedia Commons (author and licence on each file's page).
Forms of millennium
- millennia plural
- millenniums plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does millennium mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A period of time consisting of one thousand years.
- 2
The year in which one period of one thousand years ends and another begins, especially the year 2000.
A huge fireworks display was put on in Sydney to celebrate the millennium.
- 3
archaicAny long (and possibly endless) era of universal happiness, peace, and prosperity, predicted by various people to come about someday.
Near-synonym: utopia
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Millennium in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | millénaire , millénium |
| German | Jahrtausend, Millennium |
| Portuguese | milénio, milênio |
| Spanish | milenio |
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.