antediluvian

/ˌantɪdɪˈluːvɪən/

noun

adjective

Ancient or antiquated.
Similar: antediluvial, old, prehistoric
Extremely dated.
"Those ideas are antediluvian."
Similar: dated, old-fashioned
Pertaining or belonging to the time period prior to a great or destructive flood or deluge.
Similar: preflood

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