antediluvian
Definitions
Relating to the period before the biblical flood described in the Book of Genesis.
Extremely old-fashioned, antiquated, or out of date.
Examples
The professor's teaching methods seemed positively antediluvian in the age of digital classrooms.
He insisted on using an antediluvian typewriter to draft his novels, claiming it helped him focus.
Synonyms
archaic outdated obsolete ancient primeval old-fashioned prehistoric