valedictorian
noun
                                                                                                                            
                                                            val·e·dic·to·ri·an
                    
                                                                                                              
                                                                                                                                  ˌva-lə-ˌdik-ˈtȯr-ē-ən 
                                                      
                                                          
            
                                
              
          
                                                      : the student usually having the highest rank in a graduating class who delivers the valedictory address at the commencement exercises                                      
                
                    
Love words? Need even more definitions?
  
  Merriam-Webster unabridged




Share