(card games) A solitaire card game where the cards are arranged as a triangle (a "pyramid") and the object is to get the cards from the bottom to the top.

In the form of a pyramid.

A tower made of people standing or kneeling on top of each other. / (circus) A formation of triangular shape with one or a small number of performers supporting a large number of other performers.

An illicit money-making investment scheme whereby early investors are paid primarily or wholly by later investors. Eventually all such schemes fail to the detriment of recent (later) investors.

(geometry) A three-dimensional geometric figure with a square base and four triangular sides that connect at one point. An example is the Great Pyramid of Giza.

A three-dimensional figure with four triangular bases.

plural of square pyramid

plural of triangular pyramid

plural of pyramid scheme

(anatomy) A major collection of axons that transmits nerve impulses from the motor cortex to the spinal cord.