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Definition: hierarchical

A structure made up of different levels like a company organization chart. The higher levels have control or precedence over the lower levels. Hierarchical structures are a one-to-many relationship; each item having one or more items below it. See hierarchical navigation and hierarchical addressing.

File Systems Are Hierarchical
The system for organizing files on a hard drive or SSD is structured as a hierarchy. The desktop is often placed at the top of the hierarchy, followed by folders and subfolders within the folders. See folder, Win Explorer and file system.