Having a matching arrangement on each of two sides.(noun)
The policy of having bilateral agreements between two countries (as opposed to unilateralism and multilateralism).(noun)
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Use "bilateralism" in a sentence
"There is ample evidence to support this hypothesis, including recent genomic discoveries concerning the evolution of fundamental structures including bilateralism which is now know to precede the Precambrian."
"It is that bilateralism which is beginning to polarise South Africa."
"China's mind-boggling rise to a world diplomatic and economic superpower has created a 21st century that will be defined by bilateralism between the United States and China."