noun An ancient massive construction with a square or rectangular base and four triangular sides meeting in an apex, such as those built as tombs in Egypt or as bases for temples in Mesoamerica.
noun A construction in the shape of a pyramid, usually with a square or rectangular base.
noun A solid with triangular lateral faces and a polygonal (often square or rectangular) base.
noun Any structure or diagram with many members at the bottom and progressively fewer towards the top.
The company was organized as a pyramid, with a CEO in charge of four directors, each heading up a department.
noun A medullary pyramid, the medial-most bumps on the ventral side of the medulla oblongata
noun The game of pool in which the balls are placed in the form of a triangle at spot.
noun A pyramid scheme.
noun Alternative letter-case form of Pyramid. (a solitaire card game)