Webster's Dictionary 
(1): ( n.) The act of cutting, or separation by cutting; as, the section of bodies.
(2): ( n.) A part separated from something; a division; a portion; a slice.
(3): ( n.) A distinct part or portion of a book or writing; a subdivision of a chapter; the division of a law or other writing; a paragraph; an article; hence, the character /, often used to denote such a division.
(4): ( n.) A distinct part of a country or people, community, class, or the like; a part of a territory separated by geographical lines, or of a people considered as distinct.
(5): ( n.) One of the portions, of one square mile each, into which the public lands of the United States are divided; one thirty-sixth part of a township. These sections are subdivided into quarter sections for sale under the homestead and preemption laws.
(6): ( n.) The figure made up of all the points common to a superficies and a solid which meet, or to two superficies which meet, or to two lines which meet. In the first case the section is a superficies, in the second a line, and in the third a point.
(7): ( n.) A division of a genus; a group of species separated by some distinction from others of the same genus; - often indicated by the sign /.
(8): ( n.) A part of a musical period, composed of one or more phrases. See Phrase.
(9): ( n.) The description or representation of anything as it would appear if cut through by any intersecting plane; depiction of what is beyond a plane passing through, or supposed to pass through, an object, as a building, a machine, a succession of strata; profile.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature 
the representation of a building cut asunder vertically so as to show the interior; also of a moulding or other member in architecture cut asunder so as to show its profile.