Definition of "King" :

noun: (chess) the weakest but the most important piece

noun: one of the four playing cards in a deck bearing the picture of a king

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: a very wealthy or powerful businessman

noun: a male sovereign; ruler of a kingdom

noun: a competitor who holds a preeminent position

noun: United States charismatic civil rights leader and Baptist minister who campaigned against the segregation of Blacks (1929-1968)

noun: United States guitar player and singer of the blues (born in 1925)

noun: United States woman tennis player (born in 1943)

noun: preeminence in a particular category or group or field

"The lion is the king of beasts."