Meaning

noun a building (or room) where dead bodies are kept before burial or cremation

adjective of or relating to or characteristic of death

adjective of or relating to a funeral

originFrom Middle English mortuary, from Anglo-Norman mortuarie (“gift to a parish priest from a deceased parishioner”), from Medieval Latin mortuārium (“receptacle for the dead; mortuary”), neuter form of mortuārius (“of or pertaining to the dead”), from Latin mortuus, perfect passive participle of morior (“to die”).

Etymology from Wiktionary, CC BY-SA 3.0