noun
millennia
noun
1
The plural of millennium; periods of a thousand years.
"These ruins have stood for millennia."
How to Use Millennia
Learner’s notesIn plain EnglishMore than one thousand-year period — the plural form of "millennium."
Common mistake
Millennia is already plural; don't write "millenniums" or "millenias."
Common pairings
for millennia
over millennia
millennia ago
Word Forms
millennia plural, millennias plural
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These ruins have stood for _____.