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ms-mcgregor eNotes educator| Certified Educator
Amontillado is a type of wine. This wine was stored in casks, or large barrels. So the cask of amontillado is a large barrel of wine. In his story, "The Cask of Amontillado", the main character, Montressor, uses the story that he has obtained a barrel of this wine in the middle of carnival season. He wants Fortunato to taste the wine to see if it's really amontillado. Thus Montessor is able to lure Fortuanato into his catacombs, which served as his wine cellar, and then bury him alive.
parkerlee eNotes educator| Certified Educator

In literature, "The Cask of the Amontillado" is the title of a short story written by Edgar Allen Poe in the 1840s. The title refers to a kind of pale dry sherry from Montillo, Spain which the narrator used to entice his enemy into his family's crypt, serving also as their wine cellar.

A cask is a barrel-shaped container for storing liquids (in this case wine); it is also a unit of measurement for the amount of liquid able to be stored in such a container.