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Illustration of the deluge, from the nineteenth-century illustrated Bible of Gustave Doré


From ante- (before) +‎ Latin dīluvium (flood) +‎ -an; in reference to the story of Noah’s Ark (Genesis 6–9), an early episode in the Bible.


  • (UK) IPA(key): /ˌantɪdɪˈluːvɪən/
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antediluvian (comparative more antediluvian, superlative most antediluvian)

  1. Ancient or antiquated.
    Synonyms: antediluvial, old, prehistoric; see also Thesaurus:old
  2. Extremely dated.
    Synonyms: dated, old-fashioned; see also Thesaurus:obsolete
    Those ideas are antediluvian.
    • 2021 December 3, “LGBTQ couples, families and marriage are ‘against the natural order,’ Thai Constitutional Court rules”, in Coconuts Bangkok[1], Bangkok: Coconuts Media Limited, retrieved 2021-12-03:
      Portions of the ruling reflected the court’s culturally conservative roots, stating that because marriage is only for reproduction, LGBTQ relationships are unnatural because they cannot produce children. [] The ruling continued in its surprisingly antediluvian rationale, invalidating untold numbers of nontraditional families.
    • 2010, Sam Chaltain, American Schools: The Art of Creating a Democratic Learning Community, Lanham, MD: Rowman & Littlefield Education, →ISBN, page 41:
      If we agree with Blinder's assessment, we must acknowledge the pressing need to inject new ideas into an old system – a system so antediluvian that it is, remarkably, still based on the agrarian calendar.
  3. Pertaining or belonging to the time period prior to a great or destructive flood or deluge.
    Synonym: preflood
  4. (biblical) Pertaining or belonging to the time prior to Noah's Flood.
    Synonym: antediluvial
    Coordinate term: prelapsarian


The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout § Translations.


antediluvian (plural antediluvians)

  1. One who lived prior to Noah's Flood.
    • 1828, James Hogg, The Brownie of the Black Haggs:
      He was a boy in form, and an antediluvian in feature.

Related terms[edit]

Further reading[edit]



From French antédiluvien


antediluvian n (plural antediluvieni)

  1. antediluvian