Pyramids are ancient stone buildings with four triangular sloping sides. The most famous pyramids are those built in ancient Egypt to contain the bodies of their kings and queens.
We set off to see the Pyramids and Sphinx.
2. countable noun
A pyramid is a shape, object, or pile of things with a flat base and sloping triangular sides that meet at a point.
On a plate in front of him was piled a pyramid of flat white biscuits. [+ of]
3. countable noun
You can describe something as a pyramid when it is organized so that there are fewer people at each level as you go towards the top.
The structure of the group is more like a loose net than a hierarchical pyramid.
pyramid in British English
(ˈpɪrəmɪd)
noun
1.
a huge masonry construction that has a square base and, as in the case of the ancient Egyptian royal tombs, four sloping triangular sides
2.
an object, formation, or structure resembling such a construction
3. mathematics
a solid having a polygonal base and triangular sides that meet in a common vertex
4. crystallography
a crystal form in which three planes intersect all three axes of the crystal
5. anatomy
any pointed or cone-shaped bodily structure or part
6. finance
a group of enterprises containing a series of holding companies structured so that the top holding company controls the entire group with a relatively small proportion of the total capital invested
7. mainly US
the series of transactions involved in pyramiding securities
8. (plural)
a game similar to billiards with fifteen coloured balls
verb
9.
to build up or be arranged in the form of a pyramid
10. mainly US
to speculate in (securities or property) by increasing purchases on additional margin or collateral derived from paper profits associated with high prices of securities and property in a boom
11. finance
to form (companies) into a pyramid
Also called (rare): pyramis
Derived forms
pyramidal (pɪˈræmɪdəl), pyramidical (ˌpyraˈmidical) or pyramidic (ˌpyraˈmidic)
adjective
pyramidally (pyˈramidally) or pyramidically (ˌpyraˈmidically)
adverb
Word origin
C16 (earlier pyramis): from Latin pyramis, from Greek puramis, probably from Egyptian
pyramid in American English
(ˈpɪrəmɪd)
noun
1.
any huge structure with a square base and four sloping, triangular sides meeting at the top, as those built by the ancient Egyptians for royal tombs
2.
an object, formation, structure, or organization shaped like or suggesting a pyramid
3.
a crystal form in which as many as 12 sloping faces intersect at a point
4. Geometry
a solid figure having a polygonal base, the sides of which form the bases of triangular surfaces meeting at a common vertex
verb intransitive, verb transitive
5.
to build up, mass, or heap in the form of a pyramid
6. US
to engage in (a series of buying or selling operations) during an upward or downward trend in the stock market, working on margin with the profits made in the transactions
Idioms:
the (Great) Pyramids
Derived forms
pyramidal (pyˈramidal) (pɪˈræmɪdəl)
adjective
pyramidally (pyˈramidally)
adverb
pyramidic (ˌpyraˈmidic)
adjective or ˌpyraˈmidical
Word origin
L pyramis (gen. pyramidis) < Gr, pyramid: replaced ME piramis, also < L