The crossword solution for the term LOCKING is RIVETING, which is an 8 letter word. RIVETING is a process in which two or more pieces of metal are joined together by using a rivet, which is a metal pin with a head on one end. The rivet is inserted into a hole in both pieces of metal and then heated until it expands, creating a strong bond between the two pieces. RIVETING is commonly used in the construction of aircraft, ships, and other large structures.