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


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



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.
  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


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antediluvian (plural antediluvians)

  1. One who lived prior to Noah's Flood.

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