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1. Having many sides.
2. Involving more than two nations or parties: multilateral trade agreements.

mul′ti·lat′er·al·ism n.
mul′ti·lat′er·al·ist n.
mul′ti·lat′er·al·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adv.1.multilaterally - in a multilateral manner;so as to affect many parties or governments; "they worked out an agreement unilaterally"
one-sidedly, unilaterally - in a unilateral manner; by means of one part or party; "they worked out an agreement unilaterally"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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In the July summit's final communique, the heads of state stressed the importance of a permanent, frank and open dialogue that should be strengthened both bilaterally between the states of the region and multilaterally, for the consolidation of peace and security as a fundamental premise for economic integration.
Asked about government efforts to help remove doubts in the growing China-Philippines ties, Andanar said both countries strive to increase their engagement both bilaterally and multilaterally.
We cooperate multilaterally and reach understanding on all current issues related to development of bilateral ties," PM Askar Mamin said.
At this meeting, he also highlighted Sri Lanka's engagements with several partner countries and organisations bilaterally and multilaterally on the nonproliferation initiatives.
President Weah expressed his desire that he and his Italian counterpart will continue to work together both bilaterally and on multilaterally fronts on key issues such as the promotion of universal human rights, security and peace.
Bangladesh alone cannot face climate change issue as it is a global phenomenon; they said adding it should move bilaterally as well as multilaterally along with strong bargaining capacity to pile up pressure on rich nations to extend their financial and technical supports to climate vulnerable countries.
and Japan also vowed that both sides will strengthen coordination efforts -- both bilaterally and multilaterally -- to promote a free and open Indo-Pacific region.
And so we're committed to working with India, the Indian government, and on these counterterrorism efforts, both bilaterally and multilaterally, including at the United Nations.'
The meeting focused on the relations of co-operation between the two countries and ways to further expand them in all fields bilaterally and multilaterally, especially ahead of the two countries' bid for a non-permanent seat in the UN Security Council, said Minister of Foreign Affairs Khemais Jhinaoui.
"National leaders, ministers and senior officials from the Gulf, the wider Middle East, Africa, North America, Europe and Asia are offered a concentrated occasion to consult bilaterally and multilaterally on the most important security and foreign policy challenges of the moment.
"At the same time, cooperation between our countries, based on traditional friendly relations, continues multilaterally."

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