pertaining to materials used for making nuclear weapons; by extension, pertaining to an extremely powerful version of something
Iran's decision to enrich uranium closer to weapons-grade has convinced the United States that sanctions are all the more urgent.
PU-239 and Other Russian Fantasies By Ken Kalfus Imagine Breaking Bad but with weapons-grade plutonium instead of meth.
A total of 1,500 kilograms of low-enriched uranium is needed for further refinement to a weapons-grade amount.
Uranium spun in centrifuges to a purity of 90 percent makes for weapons-grade stuff.
Interestingly, enriching to weapons-grade is a red line that the Obama administration has already laid out.