Sentence:  We went into Mrs. Monmouth 's library , which had low bookshelves all along the walls , and above them a Modigliani portrait , a Jackson Pollock twelve feet long , and a gorgeous Miro with a yellow background , that looked like an inscription from a Martian <WSD>tomb</WSD> . 
Meaning of the word marked with <WSD> tags:  a place for the burial of a corpse (especially beneath the ground and marked by a tombstone)