From Longman Dictionary of Contemporary Englishsilver bulletsilver bulletAmerican English something that solves a difficult problem very quickly and easily There is no silver bullet for this problem. → silver
Examples from the Corpus
silver bullet• To kill the witch you need a silver bullet.• More investment isn't a silver bullet for poor neighborhoods.• A pilot scale rig dedicated to the exploration and development of the silver bullet process has been fully operational for some months.• Perhaps silver bullets would have done the trick. 