Meaning of PYRAMID in English

I. ˈpir-ə-ˌmid noun

Etymology: Latin pyramid-, pyramis, from Greek

Date: 1549


a. : an ancient massive structure found especially in Egypt having typically a square ground plan, outside walls in the form of four triangles that meet in a point at the top, and inner sepulchral chambers

b. : a structure or object of similar form

2. : a polyhedron having for its base a polygon and for faces triangles with a common vertex — see volume table

3. : a crystalline form each face of which intersects the vertical axis and either two lateral axes or in the tetragonal system one lateral axis

4. : an anatomical structure resembling a pyramid: as

a. : any of the conical masses that project from the renal medulla into the kidney pelvis

b. : either of two large bundles of motor fibers from the cerebral cortex that reach the medulla oblongata and are continuous with the pyramidal tracts of the spinal cord

5. : an immaterial structure built on a broad supporting base and narrowing gradually to an apex

the socioeconomic pyramid

• py·ra·mi·dal pə-ˈra-mə-d ə l, ˌpir-ə-ˈmi- adjective

• py·ra·mi·dal·ly adverb

• pyr·a·mid·i·cal ˌpir-ə-ˈmi-di-kəl adjective


pyramid 2


II. verb

Date: circa 1900

intransitive verb

1. : to speculate (as on a security or commodity exchange) by using paper profits as margin for additional transactions

2. : to increase rapidly and progressively step by step on a broad base

transitive verb

1. : to arrange or build up as if on the base of a pyramid

2. : to use (as profits) in speculative pyramiding

3. : to increase the impact of (as a tax assessed at the production level) on the ultimate consumer by treating as a cost subject to markup

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.