The Latin construction of “antediluvian” translates directly to “before a flood,” and in the mid-17th century, the word entered theological service to refer specifically to the time period before the biblical flood. The antediluvian age is a symbolic line in the sand for the Abrahamic religions of Judaism, Christianity, and Islam. The word “antediluvian” is now used colloquially to refer to things humorously old-fashioned.