antediluvian

adjective

  1. 1

    so extremely old as seeming to belong to an earlier period

    a ramshackle antediluvian tenement

    antediluvian ideas

  2. 2

    of or relating to the period before the biblical flood

    antediluvian man

noun

  1. 1

    a very old person

  2. 2

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

Synonyms

Also useful for “antediluvian”:Scrabble