Adjective antediluvian has 2 senses
- antediluvian, antediluvial - of or relating to the period before the Biblical flood; "Antediluvian man"
- antediluvian, antiquated, archaic - so extremely old as seeming to belong to an earlier period; "a ramshackle antediluvian tenement"; "antediluvian ideas"; "archaic laws"
Antonym: new (indirect, via old)
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Noun antediluvian has 2 senses
- antediluvian, antediluvian patriarch - any of the early patriarchs who lived prior to the Deluge
--1 is a kind of patriarch
- antediluvian - a very old (or old fashioned) person
--2 is a kind of oldster, old person, senior citizen, golden ager
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