Definition from Wiktionary, the free dictionary
- (intransitive) To be bewildered, dumbfounded, or confused.
- He boggled at the surprising news.
- The mind boggles.
- (transitive) To confuse or mystify; overwhelm.
- The vastness of space really boggles the mind.
- The oddities of quantum mechanics can boggle the minds of students and experienced physicists alike.
- (US, dialect) To embarrass with difficulties; to bungle or botch.
Derived terms 
to be bewildered, dumbfounded, or confused