multilateral
adjective
                                                                                                                            
                                                            mul·ti·lat·er·al
                    
                                                                                                              
                                                                                                                                  ˌməl-tē-ˈla-t(ə-)rəl 
                                                                                                                              
            -ˌtī-
                                                      
                                                          1
                    
                                          
              
          
                                                      : having many sides                                      
                
                    
2
                    
                                          
              
          
                                                      : involving or participated in by more than two nations or parties                                      
              
                             
multilateral agreements
                         
                
                    
                                                      multilaterally
                                      adverb
                                                                            
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  Merriam-Webster unabridged




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