Meaning of the word "main part" in English

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

main part

US /meɪn pɑːrt/
UK /meɪn pɑːt/

Noun

the most important or largest section of something

Example:
The main part of the book focuses on the history of the city.
The engine is the main part of the car.