1. people who oppose monarchy or the rule of a king or queen
Usage: plural form; often used in historical contexts, especially regarding the English Civil War

Examples

• The antiroyalists fought against King Charles I during the English Civil War.
• Many antiroyalists believed that power should rest with the people, not a monarch.
• The antiroyalists gained significant support in Parliament during the 1640s.
• Oliver Cromwell led the antiroyalists to victory in the civil conflict.
• Antiroyalists and royalists clashed repeatedly throughout the seventeenth century.