|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.||maths a solid having a polygonal base and triangular sides that meet in a common vertex|
|4.||crystallog 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.||chiefly (US) the series of transactions involved in pyramiding securities|
|8.||(plural) a game similar to billiards with fifteen coloured balls|
|9.||to build up or be arranged in the form of a pyramid|
|10.||chiefly (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|
|[C16 (earlier pyramis): from Latin pyramis, from Greek puramis, probably from Egyptian]|
pyramid pyr·a·mid (pĭr'ə-mĭd)
A solid figure with a polygonal base and triangular faces that meet at a common point.
A structure or part shaped like a pyramid.