What does SECTION mean?

noun

1. a self-contained part of a larger composition (written or musical)“he always turns first to the business section”
2. a very thin slice (of tissue or mineral or other substance) for examination under a microscope“sections from the left ventricle showed diseased tissue”
3. a distinct region or subdivision of a territorial or political area or community or group of people“no section of the nation is more ardent than the South”
4. one of several parts or pieces that fit with others to constitute a whole object“a section of a fishing rod”
5. a small team of policemen working as part of a police platoon
6. one of the portions into which something is regarded as divided and which together constitute a whole“the written part of the exam”
7. a land unit equal to 1 square mile
8. (geometry) the area created by a plane cutting through a solid