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bimillennium

American

[bahy-mi-len-ee-uhm] / ˌbaɪ mɪˈlɛn i əm /

Also bimillennial.

noun

a period of two thousand years.
a two thousandth anniversary.

Etymology

Origin of bimillennium

bi- ¹ + millennium

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.