# millennium

> English word · Noun · IPA /mɪˈlɛnɪəm/ · frequency rank #11,249

## Definitions
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.
3. Any long (and possibly endless) era of universal happiness, peace, and prosperity, predicted by various people to come about someday.

## Etymology
From Late Latin mīllennium, from Latin mīllennis (“1000-year”) + -ium (forming abstract nouns).

## Easily confused with
- **millennia** (https://plainspell.com/en/vs/millennia-vs-millennium)
- **millenium** (https://plainspell.com/en/vs/millenium-vs-millennium)
- **millennial** (https://plainspell.com/en/vs/millennial-vs-millennium)

## Common misspellings (10)
`imllennium`, `milelnnium`, `milennium`, `milleninum`, `millennimu`, `millenniumm`, `millennuim`, `millnenium`, `mlilennium`, `mmillennium`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/millennium