Definitions for "antediluvian"
Of or relating to the period before the Deluge in Noah's time; hence, antiquated; as, an antediluvian vehicle.
One who lived before the Deluge.
The word antediluvian comes from two Latin words. [ ante] which means 'before' and [ diluvium] which means 'deluge' or massive influx of water. In theological terms, the period before the deluge or flood of Genesis chapter 7 is spoken of as the antediluvian period. [ back
a very old (or old fashioned) person
so extremely old as seeming to belong to an earlier period; "a ramshackle antediluvian tenement"; "antediluvian ideas"; "archaic laws"