mind-bogglingˈmind-ˌboggling adjective informal 
Examples
a problem of mind-boggling complexity
ExamplesEXAMPLES FROM OTHER DICTIONARIES
Thesaurus- His salary is nothing compared to the mind-boggling figures earned by some sportsmen.
- It's mind-boggling to think that our solar system is only one among billions.
- The amount of logging being done in national forests is mind-boggling.
- The amount of money that some countries spend on weapons is mind-boggling.
- And when the pitcher makes a mistake and throws a fat pitch, McGwire is capable of sending it mind-boggling distances.
- But probability says the mind-boggling run of accidents, injuries, bad moves and coaching turmoil can not duplicate itself next season.
- But the true history of the Lord Hasan - Hasan the Second, on his name be peace - was mind-boggling stuff.
- Couture encompasses mind-boggling mixes of fabrics and patterns, handmade laces and perfect tailoring.
- I was now faced with the administration of a problem of almost mind-boggling complexity.
- If the mammals had prevailed when the opportunity first presented then the scope for speculation becomes mind-boggling.
- The £304m five-year football package is mind-boggling, with each club guaranteed at least £1.5m a year for five years.
Longman Language Activatormaking you feel surprised► surprising
difficult to imagine and very big, strange, or complicated: · A surprising number of teenagers leave school without being able to read and write.· Some of the conclusions in the report were quite surprising.it is surprising (that) · Wasn't it surprising that so few people came to the party?it is surprising to see/find/ learn etc · In such a small town it was surprising to find so many really good restaurants.it is surprising how/what etc · Liddy really didn't want to change school, but it was surprising how quickly she got used to the new one.
► amazing very surprising - use this especially about something very good or impressive: · Hong Kong is an absolutely amazing city.· What an amazing achievement!it is amazing how/what: · It's amazing how much work you can do in a day if you put your mind to it.it is amazing that: · After 2000 years, it's amazing that the inscriptions are still clear enough to read.it's amazing to see/find/think etc: · Isn't it amazing to think that men have actually stood on the moon?
► astonishing/astounding something that is astonishing or astounding is so surprising that it is difficult to believe: · If you watch the way a spider makes its web, it's really astonishing.· The submarine was moving through the water at an astonishing speed.· The results of the tests were astounding.· In the area around London, house prices rose by an astounding 200 per cent in three years.it is astonishing/astounding that: · It was astounding that, as a mother, Sally also managed to do two jobs.it is astonishing how/what: · It's astonishing how much things have changed since the arrival of computers.it is astonishing to find/think/realize etc: · Isn't it astonishing to think that people may one day live for hundreds of years?
► unbelievable/incredible extremely surprising and difficult to believe: · He's so rude. It's unbelievable!· Over the next two weeks, we saw an incredible change in her character.it is unbelievable/incredible that: · They were driving much too fast. It's incredible that no-one was hurt.it is unbelievable how/what: · I think it was really unbelievable how he went on deceiving her for all those years.it is unbelievable to see/think/realize etc: · It's unbelievable to think how slow things were in the days before e-mail.
► unexpected something that is unexpected makes you feel surprised because you did not expect it to happen or be true: · Her decision to leave was completely unexpected.· The new drug comes from an unexpected source -- potatoes.· Ella's angry outburst was so unexpected that Mike really didn't know what to say.
► startling a startling fact is one that you would never have expected to be true: · There has been a startling increase in the numbers of homeless people.· The programme documents startling new theories about the way the universe began.
► staggering a staggering number or amount is very surprising because it is so large: · Apparently, we spend a staggering £2.4 billion a year on food for our pets.· a staggering rise in crime· The results of the survey were staggering - over half the children said that they went to school without any breakfast.
► mind-boggling informal something that is mind-boggling is so big, strange, or complicated that it is almost impossible to imagine or believe: · The amount of money that some countries spend on weapons is mind-boggling.· His salary is nothing compared to the mind-boggling figures earned by some sportsmen.it is mind-boggling to think/realize etc: · It's mind-boggling to think that our solar system is only one among billions.
a problem of mind-boggling complexity