Question

Which of the following is the best definition of the term nuclear deterrence?
the belief that a nuclear war would have no winner
the idea that no nuclear weapon was as strong as armed forces
the idea that the threat of nuclear war was enough to stop an attack
the competition to acquire more and deadlier weapons

Answer 1

"the idea that the threat of nuclear war was enough to stop an attack"

This is deterrence: preventing adversary action by the credible threat of powerful retaliation. The others are incorrect definitions.