1. The time immediately after the Flood mentioned in Genesis 8:1-3 in the Bible: The postdiluvium of the Flood remained at full strength for 150 days, then "God made a wind blow over the earth, and the waters subsided; the fountains of the deep and the windows of the heavens were closed, the rain from the heavens was restrained, and the waters receded from the earth continually."
2. An event that takes place after a deluge: The damage done during the postdiluvium that came after several days of downpour resulted in extensive property damage and the loss of many lives in the village.