1. (noun)king, male monarch, Rex a male sovereign; ruler of a kingdom
2. (noun)king, queen, world-beater a competitor who holds a preeminent position
3. (noun)baron, big businessman, business leader, king, magnate, mogul, power, top executive, tycoon a very wealthy or powerful businessman "an oil baron"
5. (noun)King, Billie Jean King, Billie Jean Moffitt King United States womantennisplayer (born in 1943)
6. (noun)King, B. B. King, Riley B King United States guitarplayer and singer of the blues (born in 1925)
7. (noun)King, Martin Luther King, Martin Luther King Jr. United States charismatic civil rights leader and Baptistminister who campaigned against the segregation of Blacks (1929-1968)
8. (noun)king 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