antediluvian: Meaning and Definition of

an•te•di•lu•vi•an

1. of or belonging to the period before the Flood. Gen. 7, 8.
2. very old, old-fashioned, or out of date; antiquated; primitive: antediluvian ideas.

1. a person who lived before the Flood.
2. a very old or old-fashioned person or thing.