Definition of "antediluvial" [an•te•di•lu•vi•al]

• Of or pertaining to a time before Noah's flood (or similar deluge myth) (adjective)
• Antiquated (adjective)

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• ""Well, I shall be far more proud of it than of any old fossilized remnant of antediluvial times, I can assure you," was the quick retort."
• "We claim scriptural authority for the assertion that Jesus Christ was and is God the Creator, the God who revealed Himself to Adam, Enoch, and all the antediluvial patriarchs and prophets down to Noah; the God of"
• "But, Willy, the supports of life are not to be found in primeval rocks or antediluvial remains."