From Longman Dictionary of Contemporary Englishpyramidpyr‧a‧mid /ˈpɪrəmɪd/ ●○○ noun [countable] 1 
TBBa large stone building with four triangular (=three-sided) walls that slope in to a point at the top, especially in Egypt and Central America2 [usually singular]MANAGER a system, society, company etc that is organized in different levels, so that there is a small number of people at the top and a much larger number of people at the bottom different levels of the management pyramid At the bottom of the pyramid are the poor.3 GROUP OF THINGSa pile of objects that have been put into the shape of a pyramidpyramid of a pyramid of oranges4 CFan object shaped like a pyramid —pyramidal /pɪˈræmɪdl/ adjective
TBBa large stone building with four triangular (=three-sided) walls that slope in to a point at the top, especially in Egypt and Central America2 [usually singular]MANAGER a system, society, company etc that is organized in different levels, so that there is a small number of people at the top and a much larger number of people at the bottom different levels of the management pyramid At the bottom of the pyramid are the poor.3 GROUP OF THINGSa pile of objects that have been put into the shape of a pyramidpyramid of a pyramid of oranges4 CFan object shaped like a pyramid —pyramidal /pɪˈræmɪdl/ adjectiveExamples from the Corpus
pyramid• Luxor, built in the shape of a pyramid, complete with a sphinx out front.• There had been much talk of curses like those said to afflict pyramid robbers, which Holmes had angrily pooh-poohed.• Elite theory can be visually represented by a power pyramid, as shown in Figure 10. 1.• He was standing on this big silver pyramid where the stage was.• The balance was split between others up and down the pyramid.• Now that the apex of the pyramid was gone, there was no obvious way for decisions to be reached, .• The golf tee system is the exact opposite of the pyramid system with its massive support operation.• Professionals' self-esteem had been founded upon being at the top of the manual wages pyramid.pyramid of• a pyramid of cansFrom Longman Business Dictionarypyramidpyr‧a‧mid /ˈpɪrəmɪd/ noun [countable]ORGANIZATIONS an organization with only a few people at the top, who have a lot of power and influence over those below themOrigin pyramid (1500-1600) Latin pyramis, from Greek 