We found one dictionary that defines the word 1st millennium:

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1. 1st millennium: Wikipedia, the Free Encyclopedia

Phrases: 1st millennium BC, more... ▸ Words similar to 1st millennium ▸ Usage examples for 1st millennium ▸ Idioms related to 1st millennium ▸ Wikipedia articles (New!) ▸ Words that often appear near 1st millennium ▸ Rhymes of 1st millennium ▸ Invented words related to 1st millennium