A more thorough explanation:

Definition: An indefinite detainee is an alien who has been detained and would typically be deported, but cannot be deported because the United States does not have diplomatic relations with their country of origin. They are also known as nonremovable inmates or lifers.

Example: A person from a country that the United States does not have diplomatic relations with is arrested for a crime and found to be in the country illegally. They are detained, but cannot be deported because there is no way to send them back to their home country. This person would be considered an indefinite detainee.

Explanation: The example illustrates the definition of an indefinite detainee by showing a scenario where an individual is unable to be deported due to the lack of diplomatic relations between their home country and the United States. This can result in the person being detained indefinitely, without a clear resolution to their case.