DictionaryantediluvianExtremely old-fashioned
adjective

antediluvian

an-tee-dih-LOO-vee-un/ˌæntidɪˈluːviən/

Extremely old-fashioned or ancient.

The antediluvian telephone looks enormous beside the smartphone.

An old wooden crank telephone stands beside a modern smartphone.
Etymology

Before the Flood became a way to describe anything so old it feels ancient or obsolete.

More examples

  • The office still relies on antediluvian equipment.
  • His antediluvian views surprise his younger colleagues.

Forms

antediluvian

Similar words

antiquated
Emphasizes being outdated.
archaic
Often describes forms or practices belonging to an earlier age.