noun
                                                a male sovereign
                                                                                                Synonyms
                                                
                                                                                                                                                                        male monarch
                                                                                                                                                                                                                                Rex
                                                                                                                                                            
                                                
                                                                                                Examples
                                                
                                                                                                        - ruler of a kingdom
 
                                                                                        
                                                noun
                                                a competitor who holds a preeminent position
                                                                                                Synonyms
                                                
                                                
                                                                                             
                                                                                        
                                                noun
                                                a very wealthy or powerful businessman
                                                                                                Synonyms
                                                
                                                
                                                                                                Examples
                                                
                                                                                                        - an oil baron
 
                                                                                        
                                                noun
                                                preeminence in a particular category or group or field
                                                
                                                                                                Examples
                                                
                                                                                                        - the lion is the king of beasts
 
                                                                                        
                                                noun
                                                United States woman tennis player (born in 1943)
                                                                                                Synonyms
                                                
                                                                                                                                                                        Billie Jean King
                                                                                                                                                                                                                                Billie Jean Moffitt King
                                                                                                                                                            
                                                
                                                                                             
                                                                                        
                                                noun
                                                United States guitar player and singer of the blues (born in 1925)
                                                                                                Synonyms
                                                
                                                                                                                                                                        B. B. King
                                                                                                                                                                                                                                Riley B King
                                                                                                                                                            
                                                
                                                                                             
                                                                                        
                                                noun
                                                United States charismatic civil rights leader and Baptist minister who campaigned against the segregation of Blacks (1929-1968)
                                                                                                Synonyms
                                                
                                                                                                                                                                        Martin Luther King
                                                                                                                                                                                                                                Martin Luther King Jr.
                                                                                                                                                            
                                                
                                                                                             
                                                                                        
                                                noun
                                                a checker that has been moved to the opponent's first row where it is promoted to a piece that is free to move either forward or backward
                                                
                                                                                             
                                                                                        
                                                noun
                                                one of the four playing cards in a deck bearing the picture of a king
                                                
                                                                                             
                                                                                        
                                                noun
                                                (chess) the weakest but the most important piece