Meaning of the word "mind boggling" in English

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

mind boggling

US /ˈmaɪndˌbɑː.ɡlɪŋ/
UK /ˈmaɪndˌbɒɡ.lɪŋ/

Adjective

extremely difficult to understand or imagine

Example:
The sheer scale of the universe is truly mind-boggling.
The amount of data generated every day is mind-boggling.