[ an-tee-di-loo-vee-uh n ]
/ ˌæn ti dɪˈlu vi ən /


of or belonging to the period before the Flood. Gen. 7, 8.
very old, old-fashioned, or out of date; antiquated; primitive: antediluvian ideas.


a person who lived before the Flood.
a very old or old-fashioned person or thing.

Nearby words

  1. antechapel,
  2. antechoir,
  3. antecourt,
  4. antecubital,
  5. antedate,
  6. antediluvian patriarch,
  7. antefebrile,
  8. antefix,
  9. anteflexion,
  10. antegrade

Origin of antediluvian

1640–50; ante- + Latin dīluvi(um) a flood, deluge + -an Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for antediluvian

British Dictionary definitions for antediluvian


/ (ˌæntɪdɪˈluːvɪən, -daɪ-) /


belonging to the ages before the biblical Flood (Genesis 7, 8)
old-fashioned or antiquated


an antediluvian person or thing

Word Origin for antediluvian

C17: from ante- + Latin dīluvium flood

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for antediluvian



"before Noah's flood," 1640s, formed from Latin ante- "before" (see ante) + diluvium "a flood" (see deluge (n.)). Coined by English physician Sir Thomas Browne (1605-1682). As a noun meaning "person who lived before the Flood," from 1680s.

Online Etymology Dictionary, © 2010 Douglas Harper