We found 13 dictionaries that define the word millennia:

General (11 matching dictionaries)

1. millennia: Merriam-Webster
2. millennia: Oxford Learner's Dictionaries
3. millennia: Collins English Dictionary
4. millennia: Vocabulary.com
5. Millennia, millennia: Wordnik
6. millennia: Cambridge Advanced Learner's Dictionary
7. millennia: Wiktionary
8. millennia: Dictionary.com
9. millennia: Cambridge Essential American English Dictionary
10. Millennia: Wikipedia, the Free Encyclopedia
11. millennia: TheFreeDictionary.com

Computing (1 matching dictionary)

12. millennia: Encyclopedia

Slang (1 matching dictionary)

13. Millennia: Urban Dictionary

(Note: See millennium as well.)

Definitions from Wiktionary (millennia) ▸ noun:  (nonstandard) a single period of 1000 years, a millennium Types: 1st, 2nd, 3rd, 4th, 5th, more... Phrases: many millennia, more... Adjectives: several, many, last, past, few, next, countless, third, second, recent, previous Colors:     silver,     gold,     bronze,     ivory,     charcoal, more... ▸ Words similar to millennia ▸ Usage examples for millennia ▸ Idioms related to millennia ▸ Wikipedia articles (New!) ▸ Popular adjectives describing millennia ▸ Words that often appear near millennia ▸ Rhymes of millennia ▸ Invented words related to millennia