American English

Definition of unilateral adjective from the Oxford Advanced American Dictionary

 

unilateral

 adjective
adjective
NAmE//ˌyunəˈlæt̮ərəl//
 
 
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done by one member of a group or an organization without the agreement of the other members a unilateral decision a unilateral declaration of independence They were forced to take unilateral action. They had campaigned vigorously for unilateral nuclear disarmament (= when one country gets rid of its nuclear weapons without waiting for other countries to do the same). compare bilateral, multilateral, trilateral
unilaterally
 
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adverb The rebels unilaterally declared a cease-fire.
See the Oxford Advanced Learner's Dictionary entry: unilateral