Meaning of the word "category of" in English

What does "category of" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

category of

US /ˈkætəˌɡɔri əv/
UK /ˈkætəɡəri əv/

Phrase

a group of people or things sharing a common characteristic

Example:
This book falls into the category of historical fiction.
We need to define the different categories of customers.