of or belonging to the period before the Flood. Gen. 7, 8.

very old, old-fashioned, or out of date; antiquated; primitive

antediluvian ideas.

a person who lived before the Flood.

a very old or old-fashioned person or thing.

adjective

modern , new , up-to-date , young

adjective

age-old , ancient , antiquated , antique , archaic , hoary , obsolete , old , old-fashioned , pass , primeval , primitive , primordial , timeworn , venerable , olden , old-time