An'te-di-lü'vi-al or An'te-di-lü'vi-an, a.

a. [Lat. ante, before, and diluvialis, from diluvium, deluge or flood, from diluere, to wash to pieces, to wash away; Fr. antédiluvien. Cf. ALLUVION.] Before the flood, or deluge, in Noah's time; existing, happening, or relating to what happened, before the deluge; as, the antediluvian world.