Definition of obelisk

• n. - 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.
• n. - A mark of reference; -- called also dagger [/]. See Dagger, n., 2.
• v. t. - To mark or designate with an obelisk.