the king of Castile and Aragon who ruled jointly with his wife Isabella; his marriage to Isabella I in 1469 marked the beginning of the modern state of Spain and their capture of Granada from the Moors in 1492 united Spain as one country; they instituted the Spanish Inquisition in 1478 and supported the expedition of Christopher Columbus in 1492 (1452-1516) | (chess) the weakest but the most important piece |
| one of the four playing cards in a deck bearing the picture of a 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 |
| a male sovereign; ruler of a kingdom |
| a very wealthy or powerful businessman |
| a male competitor who holds a preeminent position |
| the husband or widower of a queen |
| preeminence in a particular category or group or field |