(noun, adjective)


1. of or relating to the period before the biblical flood

- antediluvian man

Similar word(s): antediluvial

2. so extremely old as seeming to belong to an earlier period

- a ramshackle antediluvian tenement

- antediluvian ideas

Similar word(s): old, antiquated, archaic

Sentences with antediluvian as an adjective:

- Those ideas are antediluvian.


1. any of the early patriarchs who lived prior to the Noachian deluge

Definition categories: person, patriarch

2. a very old person

Similar word(s): ancient

Definition categories: person, oldster