antediluvian \an-tih-duh-LOO-vee-uhn\ (adjective) - 1 : Of or relating to the period before the Biblical flood. 2 : Antiquated; from or belonging to a much earlier time.
(noun) - 1 : One who lived before the Biblical flood. 2 : A very old (or old-fashioned) person.
"The company's antediuluvian management team seemed unable to comprehend the simple fact that a lack of Web presence in the Internet age was akin to suicide, the first step on the downroad slope to bankruptcy."