partition-n; 3 Senses

Sense Number 1: office divider

Commentary: partition divider - a vertical structure that divides or separates

Suzy tripped and knocked over all the partitions like dominoes.
George had to stand on his desk to see over the partition.

WordNet 2.0 Sense Numbers: 1

Sense Number 2: dividing

Commentary: PARTITION[+event] division, partition, partitioning, segmentation, sectionalization, sectionalisation - the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart

The partition of the office was done over the weekend.
The partition of the bedroom kept the roommates from fighting.

WordNet 2.0 Sense Numbers: 2

Sense Number 3: piece of hard disk

Commentary: the part of a hard disk that is dedicated to a particular operating system or application and accessed as a single unit

The other partition has the file you're looking for.

WordNet 2.0 Sense Numbers: 3