Bimillennial

//baɪˈmɪlɛn.i.əl// adj, noun

adj, noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The 2,000th anniversary of an event or happening.
Adjective
  1. 1
    Occurring every 2,000 years. not-comparable

Synonyms

All synonyms
bimillennium

Etymology

From Latin bimillennialis, from bi- (“two”) mill- (“thousand”) + enni(us) (“yearly”), by analogy with bicentennial.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.