1. 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.
2. A mark of reference; called also dagger <dag/ See Dagger.
Origin: L. Obeliscus, Gr, dim. Of a spit, a pointed pillar: cf. F. Obelisque.