An obelisk (from Ancient Greek: ὀβελίσκος obeliskos; diminutive of ὀβελός obelos, "spit, nail, pointed pillar") is a tall, four-sided, narrow tapering monument which ends in a pyramid-like shape or pyramidion at the top. These were originally called tekhenu by their builders, the Ancient Egyptians. The Greeks who saw them used the Greek term 'obeliskos' to describe them, and this word passed into Latin and ultimately English. Ancient obelisks are monolithic; that is, they consist of a single stone. Most modern obelisks are made of several stones; some, like the Washington Monumen
The term stele is generally used for other monumental, upright, inscribed and sculpted stones.