Definitions of partition:

• noun:   a vertical structure that divides or separates (as a wall divides one room from another)
• 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:   the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart
• verb:   separate or apportion into sections

  Example: "Partition a room off"

• verb:   divide into parts, pieces, or sections

  Example: "The Arab peninsula was partitioned by the British"