What Does Partition Mean?
A partition, or disk partition, is a logical division on a hard disk drive (HDD) that enables a PC to have different drives. A partition divides the hard drive into several logical storage units on one drive but functions as multiple drives. A software program called a partition editor can be used to construct, delete, resize, and control a partition on the HDD.
Techopedia Explains Partition
On Microsoft operating systems, a hard disk is divided into drives. The first drive has one drive in the partition called the primary drive and is generally “C:”, which is the active partition that boots the OS. Extended partitions can be added such as “D:” and “E:” have more than one drive and are used for other storage such as programs, data files, CD-ROM, or USB drives.