antediluvian
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.