TOMBSTONE
gravestone, headstone, tombstone
(noun) a stone that is used to mark a grave
Source: WordNet® 3.1
Etymology
Noun
tombstone (plural tombstones)
A headstone marking a person's grave.
Synonyms: headstone, gravestone
(mathematics) The symbol "∎" marking the end of a proof.
Synonym: halmos
(computing, Microsoft Windows) A marker that takes the place of deleted data, allowing for replication of the deletion across servers etc.
(computing) A crashdump.
(cardiology) An unusual morphological feature on an electrocardiogram indicative of acute myocardial infarction, characterized by a massive ST elevation.
Verb
tombstone (third-person singular simple present tombstones, present participle tombstoning, simple past and past participle tombstoned)
(UK, intransitive) To take part in tombstoning: to jump into the sea, etc. from a cliff or other high point so as to enter the water vertically straight.
(surfing) For a surfboard to stand upright half-submerged in the water (like a tombstone, above) because the surfer is underwater with his or her legrope pulled tight. Often this indicates a surfer in difficulty, either held down by the power of a wave or unconscious and unable to get to the surface.
(transitive, computing, Microsoft Windows) To replace (an object or data) with a tombstone marker.
Proper noun
Tombstone
A city in southeastern Arizona.
Source: Wiktionary
Tomb"stone`, n.
Definition: A stone erected over a grave, to preserve the memory of the
deceased.
Source: Webster’s Unabridged Dictionary 1913 Edition