| pyramid | |
| 1. n. An ancient massive construction with a square or rectangular base and four triangular sides meeting in an apex, such as those built as tombs in Egypt or as bases for temples in Mesoamerica. | |
| 2. n. A construction in the shape of a pyramid, usually with a square or rectangular base. | |
| 3. n. (geometry) A solid with triangular lateral faces and a polygonal (often square or rectangular) base. | |
| 4. n. (dated) The game of pool in which the balls are placed in the form of a triangle at spot. | |
| 5. n. A pyramid scheme. | |
| 6. n. (card games) alternative case form of Pyramid. (a solitaire card game) | |
| 7. n. (card games) The triangular layout of cards in the game of Pyramid. | |
| Build your pyramid with all cards face down, except the cards in the bottom row. | |
| 8. v. to build up or be arranged in the form of a pyramid | |
| 9. v. (transitive, genetics) To combine (a series of genes) into a single genotype. | |
| 10. v. (intransitive) To employ, or take part in, a pyramid scheme. | |
