Proper noun
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.
After the Japanese attack on Pearl Harbor in 1941, the documents were moved for safekeeping to the United States Bullion Depository at Fort Knox in Kentucky, where they were kept until 1944. Source: Internet
At Fort Knox, he was a platoon guide and graduated from United States Army Basic Training January 18, 1964, one week before his marriage to Karolyn. Source: Internet
Owner of The Gathering Bakery in Fort Knox, KY, Deb Suratt, is moving to Cheyenne in January 2021 and bringing a second location of the bakery with her. Source: Internet
The Fort Knox Commissary has modified the way it normally does business to counter the effects of COVID-19-related issues and customer concerns. Source: Internet
Rose then remained at Fort Knox to assist the sergeant in training the next platoon and to help another sergeant train the Fort's baseball team. Source: Internet
After the physical, they sent all the draftees back home, but they kept five of us and took us to Fort Knox.” Source: Internet