any of the more or less distinct parts into which something is or may be divided or from which it is made up

I unscrewed every section of copper pipe, from the roof tank to the hot-water cylinder

a distinct group within a larger body of people or things

the non-parliamentary section of the party

the cutting of a solid by or along a plane

divide into sections

she began to section the grapefruit

commit (someone) compulsorily to a psychiatric hospital in accordance with a section of a mental health act

should she be sectioned and forced back into hospital?