partition

(noun) a vertical structure that divides or separates (as a wall divides one room from another). Synonyms: divider.

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

(noun) (anatomy) a structure that separates areas in an organism.

(noun) the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart. Synonyms: division, partitioning, segmentation, sectionalization, sectionalisation.

(verb) divide into parts, pieces, or sections. Synonyms: partition off. Example: "The arab peninsula was partitioned by the british."

(verb) separate or apportion into sections. Synonyms: zone. Example: "Partition a room off."