The best definition for the word "mortuary" with the prefix "mort-" meaning "death" is a tomb.
The correct definition for the word "mortuary" when considering the prefix "mort-" meaning "death" is "a tomb." A mortuary is a place where dead bodies are temporarily stored before burial or cremation. To determine the correct definition, it is important to understand the meaning of the prefix "mort-" which refers to death. By knowing the meaning of the prefix, we can make an educated guess that a mortuary would be related to death in some way, and in this case, it refers to a tomb.