Fort Knox
English
Etymology
Named after Henry Knox, the Continental Army's chief of artillery during the Revolutionary War and the country's first Secretary of War.
Proper noun
Fort Knox
- A United States Army base located in Kentucky, U.S.A.
- The United States Bullion Depository, a vault where gold reserves are stored.
- (idiomatic) A place which is very difficult to get into.
- The investigators tried their hardest to get the suspect to talk but his mind was like Fort Knox.