1. the act of killing a king or queen
2. a person who kills a king or queen

Examples

• The execution of King Charles I in 1649 was considered regicide by royalists.
• History books describe the regicide as a turning point in the English Civil War.
• The conspirators were accused of plotting regicide against the monarch.
• Oliver Cromwell was labeled a regicide after the king’s death.
• The trial focused on whether the defendant was guilty of regicide.
• Ancient Rome witnessed several acts of regicide throughout its history.