section

Definitions

1. noun

   A piece that has been cut from something.

   Examples

   • The doctor examined a thin section of the tissue.
   • A section of the tree trunk was sent for study.
   ≈cutting≈slice
2. noun

   A part or division of something.

   Examples

   • Please read the first section of the report.
   • The orchestra rehearsed one section at a time.
3. noun

   A group of similar instruments in an orchestra.

   Examples

   • The brass section played especially well tonight.
   • The string section carried the tune.
4. noun

   A numbered part of a document.

   Examples

   • Please see section 4 of the contract.
   • The report is divided into five sections.
5. noun

   The act of cutting.

   Examples

   • The doctor made a careful section of the sample.
   • The surgeon made a clean section through the tissue.
6. noun

   A drawing that shows something as if cut through.

   Examples

   • The plan included a section of the building.
   • The book showed a section of the human heart.
7. noun

   The shape of an aircraft part when cut across.

   Examples

   • Engineers checked the fuselage section for weak points.
   • The wing's section affects how well it flies.
8. noun

   In math, a function that picks one point for each part of a space.

   Examples

   • A section of the bundle gives one element for each base point.
   • Mathematicians proved a smooth section exists.
9. noun

   In math, a map that undoes another map on one side.

   Examples

   • The map has a section, so the sequence splits.
   • A section exists when the map splits.
   ≈split monomorphism
10. noun

    In advanced math, a choice of values over part of a space.

    Examples

    • A global section exists over the whole space.
    • The study measures when local sections cannot be joined.