Define "tombstone."

A tombstone is specifically recognized as a stone marker placed at a grave that bears details about the deceased individual, such as their name, birth and death dates, and often additional inscriptions or symbols that reflect their life or beliefs. This physical marker serves both a memorial function and a historical record for the individual buried at that site.

In distinguishing this definition from the other options, it becomes clear that a tombstone is not merely a decorative piece in the cemetery; while it can be artistically crafted, its primary purpose is to mark a grave and honor the deceased. It also differs from urns used for cremated remains, which serve a different purpose entirely regarding the storage of ashes. Additionally, referring to it as an administrative term for cemetery management does not align with the primary function of a tombstone, which is solely related to memorialization rather than the operational aspects of managing a cemetery. Thus, the specific and accurate definition of a tombstone lies in its role as a grave marker.