starting gun noun
plural ∼ guns [count] : a special gun used to signal the beginning of a race
▪ The official fired the starting gun and the runners were off. ; also : the signal made by a starting gun
▪ As soon as she heard the starting gun, she took off running.
▪ The official fired the starting gun and the runners were off. ; also : the signal made by a starting gun
▪ As soon as she heard the starting gun, she took off running.
