A cutting; a part cut out from the rest of something. • A part, piece, subdivision of anything. • A group of instruments in an orchestra. • A part of a document, especially a major part; often notated with §. • An act or instance of cutting. • A cross-section (image that shows an object as if cut along a plane). • A cross-section perpendicular the longitudinal axis of an aircraft in flight. • 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. • A right inverse of a morphism in some category • 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. • An incision or the act of making an incision. • Ellipsis of Caesarean section. • thin section, a thin slice of material prepared as a specimen for research. • A taxonomic rank below the genus (and subgenus if present), but above the species. • An informal taxonomic rank below the order ranks and above the family ranks. • A group of 10-15 soldiers led by a non-commissioned officer and forming part of a platoon. • A piece of residential land; a plot. • Synonym of square mile, a unit of land area, especially in the contexts of Canadian surveys and American land grants and legal property descriptions. • The symbol §, denoting a section of a document. • A sequence of rock layers. • Archeological section; vertical plane and cross-section of the ground to view its profile and stratigraphy; part of an archeological sequence. • Angle section, L-section, angle iron, steel angle, slotted angle. • A class in a school; a group of students in a regularly scheduled meeting with a teacher in a certain school year or semester or school quarter year.