partition

a vertical structure that divides or separates (as a wall divides one room from another)

(computer science) the part of a hard disk that is dedicated to a particular operating system or application and accessed as a single unit

(anatomy) a structure that separates areas in an organism

the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart

divide into parts, pieces, or sections; "The Arab peninsula was partitioned by the British"

separate or apportion into sections; "partition a room off"