An upright, four-sided pillar, gradually tapering as it rises, and terminating in a pyramid called pyramidion. It is ordinarily monolithic. Egyptian obelisks are commonly covered with hieroglyphic writing from top to bottom.
monolith stone pillar, with square sides tapering to a pyramidal, often gilded, top
four sided shafts of stone that were cult objects or monuments originating in the Old Kingdom of ancient Egypt; for the ancient Egyptians, the obelisk represented rays of sun; obelisks could be made of pink granite, for example, and have a pyramid-shaped top often covered with a gold and silver alloy to scatter the sun's rays. A Guided Tour of Ancient Egypt: The Obelisk