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bimillennium

[bahy-mi-len-ee-uh m]
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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.
Also bimillenary, bimillennial.

Origin of bimillennium

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