Antediluvian
Part of speech: noun
Definition: One who lived prior to Noah's Flood.
Part of speech: adjective
Definition: Extremely ancient or antiquated; old; prehistoric. Supremely dated. Pertaining or belonging to the time period prior to a great or destructive flood or deluge Pertaining or belonging to the time prior to Noah's Flood.
Antediluvial
Part of speech: adjective
Definition: Of or pertaining to a time before Noah's flood (or similar deluge myth)antiquated