informal
: having a very powerful or overwhelming effect on the mind
a mind-boggling [=stunning] performance
: amazingly or confusingly large, great, etc.
a mind-boggling array of options
He received a mind-boggling $200 million in pay.
The sheer vastness of space is mind-boggling.
Cite this Entry
“Mind-boggling.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/mind-boggling. Accessed 18 Jun. 2026.
Copy Citation
