Idioms
See Fort Knox in the Oxford Advanced American Dictionarybe like/as safe as Fort Knox
- (of a building) to be strongly built, often with many locks, strong doors, guards, etc., so that it is difficult for people to enter and the things kept there are safe
- This home of yours is like Fort Knox.
Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
Check pronunciation:
Fort Knox