/meuh men"toh mawr"uy, mohr"uy, mawr"ee, mohr"ee/ ; for 1 also Lat. /me men"toh moh"rddee/ , pl. memento mori for 2.
1. ( italics ) Latin. remember that you must die.
2. an object, as a skull, serving as a reminder of death or mortality.
[ 1585-95; memento mori ]