/ ˌjuːnɪˈlætrəlɪzəm; NAmE / noun
[ U ] belief in or support of unilateral action, especially the policy of getting rid of nuclear weapons without waiting for other countries to do the same
► uni·lat·eral·ist noun :
the defeat of the unilateralists on nuclear disarmament
► uni·lat·eral·ist adjective :
unilateralist defence policy