1. no longer registered; removed from an official register or list

1. past tense and past participle of deregister; to remove from an official register or list

Examples

• The company was deregistered after failing to file required documents.
• The vehicle was deregistered when the owner moved overseas.
• Several medical professionals were deregistered for misconduct.
• The charity deregistered from the nonprofit database last year.
• Once deregistered, the business could no longer operate legally.
• The trademark was deregistered due to non-use.
• All deregistered voters must re-register before the next election.