1. a rival or opposing king; a pretender to a throne or one who opposes a reigning monarch
Usage: historical; often used in medieval and early modern European history
2. in chess, a piece or concept representing an opposing or enemy king in theoretical or puzzle contexts
Usage: specialized; chess terminology

Examples

• During the civil war, the antiking claimed he had the stronger legal right to the throne.
• Medieval chronicles often recorded the deeds of antikings who challenged established rulers.
• The antiking's supporters gathered forces in the northern provinces.
• In chess problems, the antiking represents the opponent's king in complex puzzle scenarios.
• Historians debated whether the antiking was a legitimate contender or merely a rebel.