pyramid (EN)

noun

noun “pyramid”

1. a very large, old structure with a square or rectangular bottom and four sloping sides that come together at a point at the top
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   The Great Pyramid of Giza is one of the most famous pyramids in the world, built as a tomb for an Egyptian pharaoh.
2. in geometry, a shape that has a flat base (usually a square or rectangle) and triangular sides that meet at a single point on top
   The children built a small pyramid out of wooden blocks, with a square base and four triangular sides.
3. any structure or diagram with many things at the bottom and progressively fewer things towards the top
   The food pyramid shows that you should eat more grains and vegetables at the bottom and fewer sweets at the top.
4. in the brain, a specific part of the medulla oblongata that looks like a small bump and is located on the lower front side
   The doctor pointed to the medullary pyramid on the brain scan to explain the source of the patient's motor control issues.
5. a type of business model where people earn money by recruiting others rather than by selling actual products or services
   Many people lost their savings after investing in the pyramid, which promised high returns but collapsed quickly.