Longman Dictionary of Contemporary English
The Collaborative International Dictionary
mind-boggling \mind-boggling\ adj. intellectually or emotionally overwhelming; straining one's capacity to comprehend or cope; as, a mind-boggling display; a mind-boggling puzzle.
Douglas Harper's Etymology Dictionary
Wiktionary
a. (alternative spelling of mindboggling English)
WordNet
adj. intellectually or emotionally overwhelming; "a mind-boggling display"; "a mind-boggling puzzle"
Usage examples of "mind-boggling".
Here back on Earth miracles were being performed, the sciences changing everything on a daily basis, and particularly the medical sciences, where the antivirals and the anticancer treatments and the cell rejuvenation treatments were all together adding up to some larger balking of death, mind-boggling in its implications.
For young hackers of the digital underground, meeting Dorothy Denning was a genuinely mind-boggling experience.
The water rolled across the street, beginning to spread now, beginning to look more like water than that mind-boggling solid wall that had taken sundial, birdbath, and trees, but it still had power enough to sweep almost a dozen houses on the far side of Kansas Street off their foundations and into the Barrens.
Brooks had been Faith's high-school sweetheart, so it was still fairly mind-boggling to see him going gaga over study-grind Melissa instead.
Then there are his mind-boggling headbutts, which usually finish off even the most headstrong opponents.
The result is a chip that not only processes data at mind-boggling speed, but also insulates the data from the massive heat build-up such high-speed work would otherwise generate.
All over Isidis these giant new holes and hummocks were blistering the landscape, and after her talk and a sequence of mind-boggling slides, the areologist led a large group of interested scientists to the south end of Burroughs, past Moeris Lacus Mesa to the tent wall, where the neighborhood looked like it had been devastated by earthquake, the ground having heaved up to reveal a rising mass of ice like a bald round hill.
Only the mind-boggling resources of the left could persuade so many people that these elitist snobs speak for the little guy.
Besides, by using truth tables it is possible to construct some mind-boggling riddles, and Wiz had a lot of experience with truth tables.