Definition - What does Abjuration mean?
Abjuration is a process in which someone promises to renounce, deny or otherwise abandon an existing right or privilege. The promise is made under oath – often when someone seeks citizenship in another country. In the United States, for example, a rule dating to the 19th century mandates that new U.S. citizens formally reject any and all old allegiances.
Justipedia explains Abjuration
The process of abjuration is not unique to the United States, where it is an important aspect of naturalization.
In England, for instance, abjuration occurs when British subjects swear not to acknowledge anyone other than the rightful king or queen and their heirs.
Archaic English laws that have long since been abolished also mandated that certain criminals seeking asylum engage in abjuration by renouncing their rights to citizenship and accepting lifelong deportation.