Definitions

1. noun

A person or organization that is registered, especially in a formal or official capacity, such as a company registered to trade or a person registered to vote.

“The company is required to submit its financial reports to the relevant authorities as a registrant of the stock exchange.”

2. noun

A person who is registered for a particular purpose, such as a student registered for a course or a participant registered for a competition.

“The registrant for the marathon has been announced, and runners can pick up their bibs at the registration desk.”