1
                    
                                          
              
          
                                                      : of or relating to first class                                      
                
                    
2
                    
                                          
              
          
                                                      : of the highest quality                                      
              
                             
a first-class meal
                         
                
                    
                                                      first-class
                                      adverb
                                                                            
    
                                
              
          
                                                      : the first or highest group in a classification: such as                                      
                
                    
        a
    
          
                                          
              
          
                                                      : the highest of usually three classes of travel accommodations                                      
                
                    
        b
    
          
                                          
              
          
                                                      : a class of mail that comprises letters, postcards, or matter sealed against inspection                                      
                
                    
Love words? Need even more definitions?
  
  Merriam-Webster unabridged




Share