a stone that is used to mark a grave
"The weathered tombstone in the corner of the cemetery bore the name of her great-grandfather, carved from granite decades ago."
A headstone marking a person's grave.
"The weathered tombstone bore her name and the dates of her long life."
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.
"After years of training on the rocks, he finally took the plunge by tombstoning off the highest ledge at sunset."
A city in southeastern Arizona.
"We drove all night through the desert heat until we finally reached Tombstone, where our stagecoach ride was supposed to begin."