What is another word for antediluvian?

Need synonyms for antediluvian? Here's a list of words from our thesaurus that you can use instead.

Adjective
Ridiculously old-fashioned
“Officials at headquarters either forgot about it, or could not store the information in a useful place because of an antediluvian computer system.”
Adjective
Of or belonging to the time before the biblical Flood
“The antediluvian myth is one where it is suggested that the ancients lived exceptionally long lives.”
Noun
A person with old-fashioned ideas
“… thought his dad was an antediluvian for refusing to use any social media.”
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