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1

pyramid

play
noun pyr·a·mid \ˈpir-ə-ˌmid\

Simple Definition of pyramid

  • : a very large structure built especially in ancient Egypt that has a square base and four triangular sides which form a point at the top

  • : a shape, object, or pile that is wide near the bottom and narrows gradually as it reaches the top

  • : something that resembles a pyramid in the way its parts are arranged or organized

Source: Merriam-Webster's Learner's Dictionary

Full Definition of pyramid

  1. 1 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. 2 :  a polyhedron having for its base a polygon and for faces triangles with a common vertex — see volume table

  3. 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. 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. 5 :  an immaterial structure built on a broad supporting base and narrowing gradually to an apex <the socioeconomic pyramid>

pyramidal play \pə-ˈra-mə-dəl, ˌpir-ə-ˈmi-\ adjective
pyramidally adverb
pyramidical play \ˌpir-ə-ˈmi-di-kəl\ adjective

Examples of pyramid in a sentence

  1. the ancient pyramids of Egypt



Illustration of pyramid

Origin of pyramid

Latin pyramid-, pyramis, from Greek


First Known Use: 1549


2

pyramid

verb pyr·a·mid

Definition of pyramid

  1. intransitive verb
  2. 1 :  to speculate (as on a security or commodity exchange) by using paper profits as margin for additional transactions

  3. 2 :  to increase rapidly and progressively step by step on a broad base

  4. transitive verb
  5. 1 :  to arrange or build up as if on the base of a pyramid

  6. 2 :  to use (as profits) in speculative pyramiding

  7. 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



Circa 1900

First Known Use of pyramid

circa 1900


PYRAMID Defined for Kids

pyramid

play
noun pyr·a·mid \ˈpir-ə-ˌmid\

Definition of pyramid for Students

  1. 1 :  a large structure built especially in ancient Egypt that usually has a square base and four triangular sides meeting at a point and that contains tombs

  2. 2 :  a shape or structure with a polygon for its base and three or more triangles for its sides which meet to form the top




Medical Dictionary

pyramid

play
noun pyr·a·mid \ˈpir-ə-ˌmid\

Medical Definition of pyramid

  1. 1:  a polyhedron having for its base a polygon and for faces triangles with a common vertex

  2. 2:  an anatomical structure resembling a pyramid: asa:  renal pyramidb:  either of two large bundles of motor fibers from the cerebral cortex that reach the medulla oblongata and are continuous with the corticospinal tracts of the spinal cordc:  a conical projection making up the central part of the inferior vermis of the cerebellum




Law Dictionary

1

pyramid

play
noun pyr·a·mid \ˈpir-ə-ˌmid\

Legal Definition of pyramid

  1. 1 :  a group of holding companies superimposed on one another to give those in control of the top holding company control over all of the companies with a small investment

  2. 2 :  the series of operations involved in pyramiding on an exchange

  3. 3 :  a pyramid scheme




2

pyramid

intransitive verb pyr·a·mid

Legal Definition of pyramid

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

  2. transitive verb
  3. 1 :  to use (as profits) in speculative pyramiding

  4. 2 :  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




3

pyramid

adjective pyr·a·mid

Legal Definition of pyramid

  1. :  of, relating to, or being an illegal scheme in which participants give money or other valuables in exchange for the opportunity to receive payment for recruiting others to participate in the scheme





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