section

noun

1. A cutting; a part cut out from the rest of something.
2. A part, piece, subdivision of anything.
3. A group of instruments in an orchestra.
4. A part of a document, especially a major part; often notated with §.
5. An act or instance of cutting.
6. A cross-section (image that shows an object as if cut along a plane).
7. A cross-section perpendicular the longitudinal axis of an aircraft in flight.
8. A function that generalizes the notion of the graph of a function; formally, a continuous right inverse to the projection map of a fiber bundle.
9. A right inverse of a morphism in some category
10. An object which is defined by analogy with sections of fiber bundles but in a more general setting (that of sheaves). Formally, an element of the image of an open set under the action of a (pre-)sheaf.
11. An incision or the act of making an incision.
12. thin section, a thin slice of material prepared as a specimen for research.
13. A taxonomic rank below the genus (and subgenus if present), but above the species.
14. An informal taxonomic rank below the order ranks and above the family ranks.
15. A group of 10-15 soldiers led by a non-commissioned officer and forming part of a platoon.
16. A piece of residential land; a plot.
17. Synonym of square mile, a unit of land area, especially in the contexts of Canadian surveys and American land grants and legal property descriptions.
18. The symbol §, denoting a section of a document.
19. A sequence of rock layers.
20. Archeological section; vertical plane and cross-section of the ground to view its profile and stratigraphy; part of an archeological sequence.