unilateralist
noun/ˌjuːnɪˈlætrəlɪst/
/ˌjuːnɪˈlætrəlɪst/
- a person who believes in or supports unilateral action, especially the policy of getting rid of nuclear weapons without waiting for other countries to do the same
- the defeat of the unilateralists on nuclear disarmament
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unilateralist