n.[C]

1. （常大写）（古埃及建造的）金字塔
   The Pyramids were among the seven wonders of the world.

   古埃及大金字塔是世界七大奇观之一。

2. 【数】棱锥（体），三角锥（体）
3. 角锥形物；角锥形的一堆东西
   Families are at the base of a socio-economic pyramid.

   家庭是社会经济金字塔的基础。

4. 宝塔诗

vt.

1. 使成尖塔（或角锥）形
2. 使步步升高；使节节增加

vi.

1. 成尖塔（或角锥）形
2. 步步升高；节节增加
   Consumer lending had pyramided since the war.

   战后消费者借贷节节上升。

n.

1. a monumental stone structure with a square or triangular base and sloping sides that meet in a point at the top, especially one built as a royal tomb in ancient Egypt.
2. Geometry  a polyhedron of which one face is a polygon and the other faces are triangles with a common vertex.
3. Anatomy  a pyramid-shaped structure, especially in the brain.
4. a system of financial growth achieved by a small initial investment.
   ▸a form of investment in which each paying participant recruits two further participants, with returns being given to early participants using money contributed by later ones.
5. (pyramids) [treated as sing.] a game played on a billiard table with fifteen coloured balls arranged in a triangle and a cue ball.

v.