Definition of mutual assured destruction in English:
mutual assured destruction
noun
Mutual deterrence between nuclear powers based on the possession by each of the capacity to destroy a substantial proportion of the population and industry of the other in response to an initial attack; abbreviated MAD.
Origin
1960s.
Definition of mutual assured destruction in US English:
mutual assured destruction
noun
Mutual deterrence between nuclear powers based on the possession by each of the capacity to destroy a substantial proportion of the population and industry of the other in response to an initial attack; abbreviated MAD.