What is an excavation in the earth as a place for interment known as?

The term "grave" specifically refers to an excavation in the earth that is designated for the burial of a deceased individual. It is the most commonly used term in the context of funerary practices, representing a physical space within the ground where a body is interred. A grave is typically excavated to a depth sufficient to accommodate the body, allowing for proper burial according to cultural and legal standards.

While "tomb" and "crypt" refer to specific types of burial locations, often above ground or enclosed structures, they do not fit the definition of a simple earth excavation. "Plot" generally refers to a designated piece of land in a cemetery but does not specifically indicate an excavation. Thus, "grave" is the correct term to describe an excavation made in the earth for the purpose of interment.