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bimillenary

[bahy-mil-uh-ner-ee]
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adjective
  1. of or relating to a bimillennium.
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noun, plural bi·mil·le·nar·ies.
  1. bimillennium.
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Also bi·mil·len·ni·al [bahy-mi-len-ee-uh l] /ˌbaɪ mɪˈlɛn i əl/.

Origin of bimillenary

First recorded in 1840–50; bi-1 + millenary

bimillennium

[bahy-mi-len-ee-uh m]
noun, plural bi·mil·len·ni·ums, bi·mil·len·ni·a [bahy-mi-len-ee-uh] /ˌbaɪ mɪˈlɛn i ə/.
  1. a period of two thousand years.
  2. a two thousandth anniversary.
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Also bimillenary, bimillennial.

Origin of bimillennium

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for bimillennial

bimillenary

adjective
  1. marking a two-thousandth anniversary
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noun plural -naries
  1. a two-thousandth anniversary
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012