a large building with a square or triangular base and sloping sides that meet in a point at the top. The ancient Egyptians built stone pyramids as places to bury their kings and queens. （古埃及的）金字塔 
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geometry 几何 a solid shape with a square or triangular base and sloping sides that meet in a point at the top 锥体；棱锥体 an object or a pile of things that has the shape of a pyramid 金字塔形的物体（或一堆东西） a pyramid of cans in a shop window 商店橱窗中摆成金字塔形的罐头
an organization or a system in which there are fewer people at each level as you get near the top 金字塔式的组织（或系统） a management pyramid 金字塔式管理系统
Word Originlate Middle English (in the geometrical sense): via Latin from Greek puramis, puramid-, of unknown ultimate origin.